Typically exchanging is done through matching the buy and sell orders placed on the system of the exchange. The sell orders are made at an offer price (or ask) while the buy order (or bid) is made to buy bitcoins. It is similar to buying stocks online where you need to enter the desired price (or market price) for buy/sell along with the quantity. These orders enter the order book and are removed once the exchange transaction is complete.
If you want to speculate on the price of a cryptocurrency then the use of a Contract for Difference (CFD) is an option to consider. You won’t actually own the cryptocurrency, which means you don’t face the hassle and hurdles of trying to buy via one of the unregulated exchanges. Instead, a CFD is a financial instrument which allows you to speculate on price movements.
Upon a sale, exchange or other disposition of shares of a Fund, a shareholder will generally realize a taxable gain or loss depending upon his or her basis in the shares. A gain or loss will be treated as capital gain or loss if the shares are capital assets in the shareholder’s hands, and generally will be long-term or short-term capital gain or loss depending upon the shareholder’s holding period for the shares. Any loss realized on a sale, exchange or other disposition will be disallowed to the extent the shares disposed of are replaced (including through reinvestment of dividends) within a period of 61 days beginning 30 days before and ending 30 days after the shares are disposed of. In such a case, the basis of the shares acquired will be adjusted to reflect the disallowed loss. Any loss realized by a shareholder on the disposition of a Fund’s Shares held by the shareholder for six months or less will be treated for tax purposes as a long-term capital loss to the extent of any distributions of Capital Gain Dividends received or treated as having been received by the shareholder with respect to such shares.
Elsewhere, here is the story of block.one, which "has raised about $700 million and counting" by selling EOS tokens that it says "do not have any rights, uses, purpose, attributes, functionalities or features." Block.one is using the money to build "a new blockchain architecture designed to enable vertical and horizontal scaling of decentralized applications," as its white paper explains, and the white paper also includes a disclaimer in bold capitals:
The identity and number of shares of the Deposit Securities required for a Portfolio Deposit for each Fund changes as rebalancing adjustments and corporate action events are reflected from time to time by ProShare Advisors with a view to the investment objective of the applicable Fund. The composition of the Deposit Securities may also change in response to adjustments to the weighting or composition of the securities constituting the relevant securities index, as applicable. The adjustments described above will reflect changes, known to ProShare Advisors on the date of announcement to be in effect by the time of delivery of the Portfolio Deposit, in the composition of the subject index being tracked by the relevant Fund, as applicable, or resulting from stock splits and other corporate actions. In addition, the Trust reserves the right to permit or require the substitution of an amount of cash (i.e., a “cash in lieu” amount) to be added to the Balancing Amount to replace any Deposit Security which may not be available in sufficient quantity for delivery or for other similar reasons. A Transaction Fee may be assessed on any “cash in lieu” amounts, as further described below under “Transaction Fees”. For the High Yield—Interest Rate Hedged, the Investment Grade—Interest Rate Hedged and the Short Term USD Emerging Markets Bond ETF, a minimum of 70% of the Deposit Securities must be delivered, unless such purchase is made on a cash-only basis.
This can serve two purposes; firstly, CFDs are a regulated financial product which means the brokers who offer them should be licensed by a regulatory authority. The brokers we review are all regulated by reputable financial regulatory bodies, offering varying degrees of protection for your money – from ensuring it is held in a segregated bank account to participation in compensation schemes should the broker become insolvent. There are, of course, criminal CFD brokers operating outside the law so you should do your homework before depositing!
  •   Lack of liquid markets, and possible manipulation of blockchain-based assets. Digital assets that are represented and trade on a blockchain may not necessarily benefit from viable trading markets. Stock exchanges have listing requirements and vet issuers, and perhaps users. These conditions may not necessarily be replicated on a blockchain, depending on the platform’s controls and other policies. The more lenient a blockchain is about vetting issuers of digital assets or users that transact on the platform, the higher the potential risk for fraud or the manipulation of digital assets. These factors may decrease liquidity or volume, or increase volatility of digital securities or other assets trading on a blockchain.
The Funds may purchase and write options on indexes to create investment exposure consistent with their investment objectives, to hedge or limit the exposure of their positions, or to create synthetic money market positions. An index fluctuates with changes in the market values of the assets included in the index. Options on indexes give the holder the right to receive an amount of cash upon exercise of the option. Receipt of this cash amount will depend upon the closing level of the index upon which the option is based being greater than (in the case of a call) or less than (in the case of a put) the level at which the exercise price of the option is set. The amount of cash received, if any, will be the difference between the closing price level of the index and the exercise price of the option, multiplied by a specified dollar multiple. The writer (seller) of the option is obligated, in return for the premiums received from the purchaser of the option, to make delivery of this amount to the purchaser. All settlements of index options transactions are in cash.
When the Advisor determines that the price of a security is not readily available or deems the price unreliable, it may, in good faith, establish a fair value for that security in accordance with procedures established by and under the general supervision and responsibility of the Trust’s Board of Trustees. The use of a fair valuation method may be appropriate if, for example, market quotations do not accurately reflect fair value for an investment, an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (for example, a foreign exchange or market), a trading halt closes an exchange or market early, or other events result in an exchange or market delaying its normal close.
Interest Rate Swaps. Interest rate swaps, in their most basic form, involve the exchange by a Fund with another party of their respective commitments to pay or receive interest. For example, a Fund might exchange its right to receive certain floating rate payments in exchange for another party’s right to receive fixed rate payments. Interest rate swaps can take a variety of other forms, such as agreements to pay the net differences between two different interest indexes or rates, even if the parties do not own the underlying instruments. Despite their differences in form, the function of interest rate swaps is generally the same: to increase or decrease a Fund’s exposure to long- or short-term interest rates. For example, a Fund may enter into a swap transaction to preserve a return or spread on a particular investment or a portion of its portfolio or to protect against any increase in the price of securities the Fund anticipates purchasing at a later date.
In determining its net capital gain, including in connection with determining the amount available to support a Capital Gain Dividend (as defined below), its taxable income and its earnings and profits, a RIC generally may elect to treat part or all of late-year ordinary loss (generally, its net ordinary loss attributable to the portion of the taxable year after December 31) as if incurred in the succeeding taxable year.
Ethereum (ETH) is more than just a currency – it’s like one giant computer housing many computers around the globe. Ethereum can respond to sophisticated requests. Its ability to store revolutionary computer programs, known as smart contracts, gives Ethereum an edge over Bitcoin and has attracted attention from banks around the world. This, among other factors, has led to a jump of almost 10,000% in 2017!

Municipal notes with maturities of three years or less are usually given note ratings (designated SP-1 or SP-2) to distinguish more clearly the credit quality of notes as compared to bonds. Notes rated SP-1 have a very strong or strong capacity to pay principal and interest. Those issues determined to possess overwhelming safety characteristics are given the designation of SP-1+. Notes rated SP-2 have a satisfactory capacity to pay principal and interest.

All three DBRS rating categories for short term debt use “(high)”, “(middle)” and “(low)” as subset grades to designate the relative standing of the credit within a particular rating category. The following comments provide separate definitions for the three grades in the Prime Credit Quality area, as this is where ratings for active borrowers in Canada continue to be heavily concentrated.
•   Any distributions from income or short-term capital gains that you receive generally are taxable to you as ordinary dividends for federal income tax purposes. Ordinary dividends you receive that a Fund reports as “qualified dividend income” may be taxed at the same rates as long-term capital gains, but will not be considered long-term capital gains for other federal income tax purposes, including the calculation of net capital losses.
RD – Restricted default. ‘RD’ ratings indicate an issuer that in Fitch’s opinion has experienced an uncured payment default on a bond, loan or other material financial obligation but which has not entered into bankruptcy filings, administration, receivership, liquidation or other formal winding-up procedure, and which has not otherwise ceased operating. This would include:
  •   an officer of an investment company, or a person that would be an investment company but for the exclusions provided by sections 3(c)(1) and 3(c)(7) of the 1940 Act, having the same investment adviser or principal underwriter as the Trust or having an investment adviser or principal underwriter that directly or indirectly controls, is controlled by, or is under common control with the Advisor or principal underwriter of the Trust;
The Fund expects to gain exposure to bitcoin futures contracts by investing a portion of its assets in a wholly-owned subsidiary of the Fund organized under the laws of the Cayman Islands (the “Subsidiary”). The Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all of the investor protections of the 1940 Act. Thus, the Fund, as the sole investor in the subsidiary, will not have all of the protections offered to shareholders of registered investment companies.

The table below shows a performance example of a Short ProShares Fund that has an investment objective to correspond to the inverse (-1x) of the daily performance of an index. In the chart below, areas shaded lighter represent those scenarios where a Short ProShares Fund will return the same or outperform (i.e., return more than) the index performance; conversely, areas shaded darker represent those scenarios where a Short ProShares Fund will underperform (i.e., return less than) the index performance.

If you are doing any active trading, set stop losses. For any coins not in your medium or long-term holds, always set stop losses. This is important for several reasons — the most obvious is mitigating your losses. But more importantly, you force yourself to decide on a point of acceptable loss, and because you now have a reference point, you are able to measure your effectiveness to keep or adjust for future trades. Sometimes, during a market dip, altcoins can plummet, and stop losses can lead to profitability by automatically selling for fiat that you can use to re-enter at lower prices.

In general, a beneficial owner of Fund Shares who or which is a foreign shareholder is not subject to U.S. federal income tax on gains (and is not allowed a deduction for losses) realized on a sale of shares of the Fund unless (i) such gain effectively connected with the conduct of a trade or business carried on by such holder within the United States, (ii) in the case of an individual holder, the holder is present in the United States for a period or periods aggregating 183 days or more during the year of the sale or and certain other conditions are met, or (iii) the special rules relating to gain attributable to the sale or exchange of “U.S. real property interests” (“USRPIs”) apply to the foreign shareholder’s sale of shares of the Fund (as described below).

A Precautionary Note Regarding Unusual Circumstances — ProShares Trust can postpone payment of redemption proceeds for any period during which (1) [the Exchange] is closed other than customary weekend and holiday closings, (2) trading on [the Exchange] is restricted, (3) any emergency circumstances exist, as determined by the SEC, and (4) the SEC by order permits for the protection of shareholders of the Fund, as further described in the SAI.
Tax Risk — In order to qualify for the special tax treatment accorded a regulated investment company (“RIC”) and its shareholders, the Fund must derive at least 90% of its gross income for each taxable year from “qualifying income,” meet certain asset diversification tests at the end of each taxable quarter, and meet annual distribution requirements. The Fund’s
I have worked with the CME in the past on product development (specifically CDS futures) and from my experience, they would not have missed anything this simple.  In fact, while I am not a huge fan of the concept of Bitcoin futures, as currently implemented, I do not expect any errors in the operation of the CME or CBOE futures contract.  I am sure that regulators will be questioning them on the back of the OKEX, as they should, and I am also quite positive the exchanges here will pass with flying colors.
The information herein represents the opinion of the author(s), but not necessarily those of VanEck, and these opinions may change at any time and from time to time. Non-VanEck proprietary information contained herein has been obtained from sources believed to be reliable, but not guaranteed. Not intended to be a forecast of future events, a guarantee of future results or investment advice. Historical performance is not indicative of future results. Current data may differ from data quoted. Any graphs shown herein are for illustrative purposes only. No part of this material may be reproduced in any form, or referred to in any other publication, without express written permission of VanEck.
Unsponsored ADR programs are organized independently and without the cooperation of the issuer of the underlying securities. As a result, available information concerning the issuers may not be as current for unsponsored ADRs, and the price of unsponsored depositary receipts may be more volatile than if such instruments were sponsored by the issuer and/or there may be no correlation between available information and the market value.
For hedging purposes, the Funds may invest in forward currency contracts to hedge either specific transactions (transaction hedging) or portfolio positions (position hedging). Transaction hedging is the purchase or sale of forward currency contracts with respect to specific receivables or payables of the Funds in connection with the purchase and sale of portfolio securities. Position hedging is the sale of a forward currency contract on a particular currency with respect to portfolio positions denominated or quoted in that currency.

  •   Intellectual property claims. A proliferation of recent startups attempting to apply blockchain technology in different contexts means the possibility of conflicting intellectual property claims could be a risk to an issuer, its operations or its business. This could also pose a risk to blockchain platforms that permit transactions in digital securities.

Investments in common units of MLPs involve risks that differ from investments in common stock. Holders of common units of MLPs have the rights typically provided to limited partners in limited partnerships and, thus, may have limited control and limited voting rights as compared to holders of a corporation’s common shares. Holders of common units may be subject to conflicts of interest with the MLP’s general partner, including those arising from incentive distribution payments. MLPs may also have limited financial resources and units may be subject to cash flow and dilution risk. In addition, investments held by MLPs may be relatively illiquid, limiting the MLPs’ ability to vary their portfolios promptly in response to changes in economic or other conditions. Accordingly, MLPs may be subject to more erratic price movements because of the underlying assets they hold. Further, a Fund’s investment in MLPs subjects the Fund to the risks associated with the specific industry or industries in which the MLPs invest.
In addition, there may be times when the market price and the value of the Fund’s holdings vary significantly and you may pay more than the value of the Fund’s holdings when buying the Fund’s shares on the secondary market, and you may receive less than the value of the Fund’s holdings when you sell those shares. While the creation/ redemption feature is designed to make it likely that shares normally will trade close to the value of the Fund’s holdings, disruptions to creations and redemptions may result in trading prices that differ significantly from the value of the Fund’s holdings. The market price of shares, like the price of any exchange-traded security, includes a “bid-ask spread” charged by the exchange specialist, market makers or other participants that trade the particular security. In times of severe market disruption, the bid-ask spread often increases significantly. This means that shares may trade at a discount to the value of the Fund’s holdings, and the discount is likely to be greatest when the price of shares is falling fastest, which may be the time that you most want to sell your shares. The Fund’s investment results are measured based upon the daily NAV of the Fund. Investors purchasing and selling shares in the secondary market may not experience investment results consistent with those experienced by Authorized Participants creating and redeeming shares directly with the Fund.

Transactions in options, futures, forward contracts, swaps and certain positions undertaken by the Funds may result in “straddles” for federal income tax purposes. The straddle rules may affect the character of gains (or losses) realized by a Fund, and losses realized by the Fund on positions that are part of a straddle may be deferred under the straddle rules, rather than being taken into account in calculating taxable income for the taxable year in which the losses are realized. In addition, certain carrying charges (including interest expense) associated with positions in a straddle may be required to be capitalized rather than deducted currently. Certain elections that a Fund may make with respect to its straddle positions may also affect the amount, character and timing of the recognition of gains or losses from the affected positions.
Source: MV Index Solutions GmbH (MVIS®). MVIS is a wholly owned subsidiary of Van Eck Associates Corporation. Data as of December 8, 2017 (synthesized data from BitMEX, OKCoin, CryptoFacilities, and BTCC which represents non-U.S. listed bitcoin futures trading on these exchanges). Not intended to be a forecast of future events, a guarantee of future results or investment advice. Current market conditions may not continue.  

ProShare Advisors, pursuant to a separate Management Services Agreement, performs certain administrative services on behalf of the Funds, such as negotiating, coordinating and implementing the Trust’s contractual obligations with the Funds’ service providers; monitoring, overseeing and reviewing the performance of such service providers to ensure adherence to applicable contractual obligations; and preparing or coordinating reports and presentations to the Board of Trustees with respect to such service providers as requested or as deemed necessary. For these services, the Trust pays to ProShare Advisors a fee at the annual rate of 0.10% of average daily net assets for each of the Funds. ProShare Advisors has entered into an Advisory and Management Services Fee Waiver Agreement that waives this management services fee for the Morningstar Alternatives Solution ETF through at least October 31, 2018. Prior to this date, ProShare Advisors may not terminate the arrangement without the approval of the Board.

  •   Risks Associated with Bitcoin – The Fund is exposed to risks associated with bitcoin. Investing in or gaining exposure to Bitcoin may provide the Fund with increased risk. Various global factors may negatively impact the Fund’s performance including legal, regulatory, political, social, regional and economic events. These risks, which could have a negative impact on the performance of the Fund and the trading price of Fund shares, include the following:

When a new crypto is launched, its founders announce how many coins will be mined. Once the quota is reached, no further coins can be produced. The first digital coin introduced was Bitcoin, which remains today the benchmark for all other digital coins. Among other currencies that have made their way into the cryptocurrency hall-of-fame we have: Ethereum, Ripple, Litecoin, EOS, and a number of derived currencies, including Bitcoin Cash and Bitcoin Gold.

Sub or Substratum is another open-source network with a huge focus on decentralizing the web and on “making the internet a free and fair place for the entire world.” This platform allows content creators to freely host their websites or applications on Substratum host, without any censorship blocks. Network users can then “run” Sub nodes and help the content get forwarded to end web users, who can access all Sub content in regular web browsers without any blocks or limits in shape of censorship.
The CME Group contract (symbol "BTC") began trading on December 18, 2017, building off of the success of the BRR and demand for a regulated trading venue for the digital asset market. The contract is cash-settled, based on the CME CF Bitcoin Reference Rate (BRR) which serves as a once-a-day reference rate of the U.S. dollar price of bitcoin. Bitcoin futures are listed on and subject to the rules of CME.2
Each Fund has adopted certain investment restrictions as fundamental policies that cannot be changed without a “vote of a majority of the outstanding voting securities” of the Fund. The phrase “majority of outstanding voting securities” is defined in the 1940 Act as the lesser of: (i) 67% or more of the shares of the Fund present at a duly-called meeting of shareholders, if the holders of more than 50% of the outstanding shares of the Fund are present or represented by proxy; or (ii) more than 50% of the outstanding shares of the Fund. (All policies of a Fund not specifically identified in this Statement of Additional Information or its Prospectus as fundamental may be changed without a vote of the shareholders of the Fund.) For purposes of the following limitations, all percentage limitations apply immediately after a purchase or initial investment.
These are NOT linked to or related in any way, to the futures contracts that trade on the CME or CBOE.  Not every article I have read makes this clear.  So the bright side of this story is that the contracts listed and traded on U.S. exchanges were not involved.  That is encouraging from both a regulatory aspect and for the future potential growth of cryptocurrency linked products in the U.S.
Futures contracts derive their value from an asset and more or less follow the movements of the underlying commodity, in our case: bitcoin. They ultimately settle at price of the commodity in the future on a particular exchange, or an index that represents a basket of prices at different exchanges.  So if you have a weekly future's contract and you don't want to sell out of it on the market,  then it will expire at the price at a specific time when Friday comes and if you want to maintain your position you must re-open on the new contract period. In the weekly example, if a contract is issued at April 14, 2017, it dies on April 21, 2017. If you buy the contract at a price of $1,100 and you don't sell it for the whole week, and the price ends on April 21 at $1,200, then you profit.
uncleared swaps. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, a Fund could suffer significant losses on these contracts and the value of an investor’s investment in the Fund may decline. OTC swaps of the type that may be utilized by the Fund are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty.

In 1983 the American cryptographer David Chaum conceived an anonymous cryptographic electronic money called ecash.[9][10] Later, in 1995, he implemented it through Digicash,[11] an early form of cryptographic electronic payments which required user software in order to withdraw notes from a bank and designate specific encrypted keys before it can be sent to a recipient. This allowed the digital currency to be untraceable by the issuing bank, the government, or a third party.
There are also tax risks associated with investments in MLPs. While there are benefits to MLPs that are treated as partnerships for federal income tax purposes, a change to current tax law or in the underlying business of a given MLP could result in the MLP being treated as a corporation for federal income tax purposes. If the MLP were treated as a corporation, the MLP would be required to pay federal income tax on its taxable income, which would reduce the amount of cash available for distribution by the MLP. In addition, because MLPs generally conduct business in multiple states, the Fund may be subject to income or franchise tax in each of the states in which the partnership does business. The additional cost of preparing and filing the tax returns and paying related taxes may adversely impact the Fund’s return.
Gains or losses attributable to fluctuations in exchange rates that occur between the time a Fund accrues income or other receivables or accrues expenses or other liabilities denominated in a foreign currency and the time the Fund actually collects such receivables or pays such liabilities generally are treated as ordinary income or ordinary loss. Similarly, on disposition of some investments, including debt securities and certain forward contracts denominated in a foreign currency, gains or losses attributable to
On 21 November 2017, the Tether cryptocurrency announced they were hacked, losing $31 million in USDT from their primary wallet.[89] The company has 'tagged' the stolen currency, hoping to 'lock' them in the hacker's wallet (making them unspendable). Tether indicates that it is building a new core for its primary wallet in response to the attack in order to prevent the stolen coins from being used.
JUNK BONDS. “Junk Bonds” generally offer a higher current yield than that available for higher-grade issues. However, lower-rated securities involve higher risks, in that they are especially subject to adverse changes in general economic conditions and in the industries in which the issuers are engaged, to changes in the financial condition of the issuers and to price fluctuations in response to changes in interest rates. During periods of economic downturn or rising interest rates, highly leveraged issuers may experience financial stress that could adversely affect their ability to make payments of interest and principal and increase the possibility of default. In addition, the market for lower-rated debt securities has expanded rapidly in recent years, and its growth paralleled a long economic expansion. At times in recent years, the prices of many lower-rated debt securities declined substantially, reflecting an expectation that many issuers of such securities might experience financial difficulties. As a result, the yields on lower-rated debt securities rose dramatically, but the higher yields did not reflect the value of the income stream that holders of such securities expected. Rather, the risk that holders of such securities could lose a substantial portion of their value as a result of the issuers’ financial restructuring or default. There can be no assurance that such declines will not recur. The market for lower-rated debt issues generally is thinner and less active than that for higher quality securities, which may limit each Fund’s ability to sell such securities at fair value in response to changes in the economy or financial markets. Adverse publicity and investor perceptions, whether or not based on fundamental analysis, may also decrease the values and liquidity of lower-rated securities, especially in a thinly traded market. Changes by recognized rating services in their rating of a fixed income security may affect the value of these investments. Each Fund will not necessarily dispose of a security when its rating is reduced below the rating it had at the time of purchase. However, the Advisor will monitor the investment to determine whether continued investment in the security will assist in meeting each Fund’s investment objective.
Now there is an open interest in the futures contract created. The simple act of two traders with no open interest, one making a  limit order which then gets filled by the other, is what creates this position. The exchange then holds the 0.2 BTC margin of each party and the Profit and Loss (PNL) of the contract seesaws between counterparties based on market movements. If the exchange is liquid and rational, then the market price of the contract will change as the spot market moves. So if bitcoin price starts going up, futures traders will bid the price up.
Because only a few regulations implementing the straddle rules have been promulgated, the consequences of such transactions to the Funds are not entirely clear. The straddle rules may increase the amount of short-term capital gain realized by a Fund, which is taxed as ordinary income when distributed to shareholders. Because application of the straddle rules may affect the character of gains or losses, defer losses and/or accelerate the recognition of gains or losses from the affected straddle positions, the amount which must be distributed to shareholders as ordinary income or long-term capital gain may be increased or decreased substantially as compared to a Fund that did not engage in such transactions.
The Fund may invest in stocks of small- and mid- cap companies. The risk of equity investing may be particularly acute for securities of issuers with smaller market capitalizations. Small- and mid-cap company stocks may trade at greater spreads or lower trading volumes, and may be less liquid than the stocks of larger companies. Small- and mid-cap companies may have limited product lines or resources, may be dependent upon a particular market niche and may have greater fluctuations in price than the stocks of larger companies. Further, stocks of small- and mid-sized companies could be more difficult to liquidate during market downturns compared to larger, more widely traded companies. In addition, small- and mid-cap companies may lack the financial and personnel resources to handle economic or industry-wide setbacks and, as a result, such setbacks could have a greater effect on small- and mid- cap security prices.
The Fund is an actively managed exchange traded fund. The Fund seeks to achieve its investment objective by investing substantially all of its assets in U.S. large capitalization equity securities and bitcoin futures contracts. The Fund is designed to benefit when the prices of U.S. large capitalization equity securities and bitcoin futures contracts increases. The Fund generally seeks to have 70% of the value of its portfolio invested in the equity securities of the 500 largest U.S. public companies and 30% of the value of its portfolio invested in bitcoin futures contracts. The Fund does not invest directly in bitcoin.

“One of the biggest issues when it comes to investing institutionally in digital assets is banks and larger institutions can’t hold an unregulated instrument in their balance sheet, and a futures contract is something they can hold,” said Gabor Gurbacs, director of digital-asset strategy at VanEck Associates Corp. With futures, “you don’t hold the physical bitcoin, which solves custody issues and counterparty risks with these less-regulated exchanges.”

UPDATE: I do not recommend paying to enter a Cryptocurrency mastermind group – I’ve tried a few and found the ROI to be disappointing. I am now focussing on growing my portfolio passively utilising a cryptocurrency trading bot, the renowned Notorious Bot. Having a bot that trades for me, without emotion, using an advanced algorithm, allows me to grow my portfolio in the background without it cutting into my time or stressing me out. You can familiarise yourself with the basics of cryptocurrency trading bots here. 
  negative impact on the price of such contracts. In order to comply with such limits, the Fund may be required to reduce the size of its outstanding positions or not enter into new positions that would otherwise be taken for the Fund. This could potentially subject the Funds to substantial losses or periods in which the Fund does not accept additional Creation Units.
The Declaration of Trust of the Trust disclaims liability of the shareholders or the Officers of the Trust for acts or obligations of the Trust which are binding only on the assets and property of the Trust. The Declaration of Trust provides for indemnification of the Trust’s property for all loss and expense of any Funds shareholder held personally liable for the obligations of the Trust. The risk of a Trust shareholder incurring financial loss on account of shareholder liability is limited to circumstances where the Funds would not be able to meet the Trust’s obligations and this risk, thus, should be considered remote.
Trustees, is of an adequate size to oversee the operations of the Trust, and that, in light of the small size of the Board, a complex Board leadership structure is not necessary or desirable. The relatively small size of the Board facilitates ready communication among the Board members, and between the Board and management, both at Board meetings and between meetings, further leading to the determination that a complex board structure is unnecessary. In view of the small size of the Board, the Board has concluded that designating one of the three Independent Trustees as the “lead Independent Trustee” would not be likely to meaningfully enhance the effectiveness of the Board. The Board reviews its leadership structure periodically and believes that its structure is appropriate to enable the Board to exercise its oversight of the Funds.
Leverage (All Funds, except the Matching ProShares Funds, the Managed Futures Strategy ETF, the Crude Oil Strategy ETF, the Bitcoin Futures Strategy ETF, the Short Bitcoin Futures Strategy ETF, the Blockchain/Bitcoin Strategy ETF, and the Bitcoin Futures/Equity Strategy ETF the Short (-1x) ProShares Funds and the CDS Short North American HY Credit ETF)
When a Fund purchases a put or call option on a futures contract, the Fund pays a premium for the right to sell or purchase the underlying futures contract for a specified price upon exercise at any time during the option period. By writing (selling) a put or call option on a futures contract, a Fund receives a premium in return for granting to the purchaser of the option the right to sell to or buy from the Fund the underlying futures contract for a specified price upon exercise at any time during the option period.

Unitary Fee Funds    S&P 500 Dividend Aristocrats ETF, S&P MidCap 400 Dividend Aristocrats ETF, Russell 2000 Dividend Growers ETF, MSCI EAFE Dividend Growers ETF, MSCI Europe Dividend Growers ETF, MSCI Emerging Markets Dividend Growers ETF, Decline of the Retail Store ETF, Long Online/Short Stores ETF, DJ Brookfield Global Infrastructure ETF, Large Cap Core Plus, S&P 500 Ex-Energy ETF, S&P 500 Ex-Financials ETF, S&P 500 Ex-Health Care ETF, S&P 500 Ex-Technology ETF, Equities for Rising Rates ETF, High Yield—Interest Rate Hedged, Investment Grade—Interest Rate Hedged, Managed Futures Strategy ETF, K-1 Free Crude Oil Strategy ETF (the “Crude Oil Strategy ETF”), Bitcoin Futures Strategy ETF, Short Bitcoin Futures Strategy ETF, Blockchain/Bitcoin Strategy ETF, and Bitcoin Futures/Equity Strategy ETF
The table below shows a performance example of a Short ProShares Fund that has an investment objective to correspond to the inverse (-1x) of the daily performance of an index. In the chart below, areas shaded lighter represent those scenarios where a Short ProShares Fund will return the same or outperform (i.e., return more than) the index performance; conversely, areas shaded darker represent those scenarios where a Short ProShares Fund will underperform (i.e., return less than) the index performance.
Trustees, is of an adequate size to oversee the operations of the Trust, and that, in light of the small size of the Board, a complex Board leadership structure is not necessary or desirable. The relatively small size of the Board facilitates ready communication among the Board members, and between the Board and management, both at Board meetings and between meetings, further leading to the determination that a complex board structure is unnecessary. In view of the small size of the Board, the Board has concluded that designating one of the three Independent Trustees as the “lead Independent Trustee” would not be likely to meaningfully enhance the effectiveness of the Board. The Board reviews its leadership structure periodically and believes that its structure is appropriate to enable the Board to exercise its oversight of the Funds.
Bitcoin has been on a tear this year, surging at least 1,000 percent in 2017. As the cryptocurrency gained even more attention from investors recently, the Commodity Futures Trading Commission announced on Friday that it would allow the CME and Cboe to launch bitcoin futures. The Cboe plans to launch on Dec. 10 and the CME intends to launch on Dec. 18.
EDIT: #10 Bonus (Suggested by @kerstenwirth ) — always check the ticker symbol. Ticker symbols are not universal, and may vary from exchange to exchange in rare cases. Those cases, though, can come back to bite you. For example, Bitcoin Cash trades on some exchanges as BCH, while it trades on others as BCC. BCC is also the ticker symbol for BitConnect, which was recently outted as a Ponzi Scheme. If you bought BCC under the impression was Bitcoin Cash, you would’ve lost a lot of money.

While volatile movements take away the attractiveness of any asset, a certain amount of swing in price creates trading opportunities. This is something that many traders and speculators have been taking advantage of by buying the digital currency and then selling at a profit through an exchange. The whole process makes bitcoin exchanges an important part of the ecosystem since it facilitates the buying and selling of bitcoins, as well as futures trading.