There's a lot of ins and outs which can get confusing in arbitrage trading. We won't go into the technicals of why futures contracts trade at a premium to spot price. You can read a full explanation here. If it's not of interest to you, all you need to know is that there's a tendency, the further out in time the futures contract expires, for the premium to spot to be higher and higher in nominal percentage terms.
Each Fund may consider changing its index at any time, including if, for example: the current index becomes unavailable; the Board believes that the current index no longer serves the investment needs of a majority of shareholders or that another index may better serve their needs; or the financial or economic environment makes it difficult for the Fund’s investment results to correspond sufficiently to its current index. If believed appropriate, a Fund may specify an index for itself that is “leveraged” or proprietary. There can be no assurance that a Fund will achieve its objective.
Although shares of the fund are listed for trading on a stock exchange and may be listed or traded on other U.S. and non-U.S. stock exchanges, there can be no assurance that an active trading market for the Fund’s shares will develop or be maintained. Trading in shares on an exchange may be halted due to market conditions or for reasons that, in the view of an exchange, make trading in shares inadvisable. In addition, trading in shares on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. Short selling of shares is also limited pursuant to SEC rules if the trading price of shares varies by more than 10% from the previous day’s closing price on the exchange. There can be no assurance that the requirements of the exchange necessary to maintain the listing of the Fund will continue to be met or will remain unchanged or that the shares will trade with any volume, or at all, on any stock exchange.
In 1998, Wei Dai published a description of "b-money", an anonymous, distributed electronic cash system.[14] Shortly thereafter, Nick Szabo created "bit gold".[15] Like bitcoin and other cryptocurrencies that would follow it, bit gold (not to be confused with the later gold-based exchange, BitGold) was an electronic currency system which required users to complete a proof of work function with solutions being cryptographically put together and published. A currency system based on a reusable proof of work was later created by Hal Finney who followed the work of Dai and Szabo.
The Guidelines are maintained and implemented by ISS and are an extensive list of common proxy voting issues with recommended voting actions based on the overall goal of achieving maximum shareholder value and protection of shareholder interests. Generally, proxies are voted in accordance with the voting recommendations contained in the Guidelines. If necessary, the Advisor will be consulted by ISS on non-routine issues. Proxy issues identified in the Guidelines include but are not limited to:
  •   A new competing digital asset may pose a challenge to bitcoin’s current market dominance, resulting in a reduction in demand for bitcoin, which could have a negative impact on the price of bitcoin. It is possible that other digital currencies and trading systems could become more widely accepted and used than bitcoin. The rise of such currencies could lead to a reduction in demand for bitcoin, which could have a negative impact on the price of bitcoin.
A Fund may invest in one or more exchange-traded funds that invest in commodities or options, futures, or forwards with respect to commodities, and are treated as QPTPs for federal income tax purposes. As noted above, a Fund is limited to investing no more than 25% of the value of its total assets in the securities of one or more QPTPs. Although income from QPTPs is generally qualifying income, if an ETF intending to qualify as a QPTP fails to so qualify and is treated as a partnership for U.S. federal income tax purposes, a portion of its income may not be qualifying income. It is also possible that an ETF intending to qualify as a QPTP will be treated as a corporation for federal income tax purposes. In such a case, it will be potentially liable for an entity-level corporate income tax, which will adversely affect the return thereon. There can be no guarantee that any ETF will be successful in qualifying as a QPTP. In addition, there is little regulatory guidance concerning the application of the rules governing qualification as a QPTP, and it is possible that future guidance may adversely affect the qualification of ETFs as QPTPs. A Fund’s ability to pursue an investment strategy that involves investments in QPTPs may be limited by that Fund’s intention to qualify as a RIC, and may bear adversely on that Fund’s ability to so qualify.
Categorize your investments and look at the long picture. In the process of your research, you’ll eventually realize you’re coming across a few different categories of coins. For some of them, you believe they have good teams, great vision, amazing publicity and a track record for successful execution. Great! Put these into medium or long-term holds and let them marinate into a delicious tenderloin. When the price dips, don’t even consider panic selling because anything in your medium or long-term portfolio should remain untouched for a set amount of time. BNB is a good example of a coin Miles considers a long hold. Recently, it dipped 20% for a while, and within our community, we witnessed some sell-offs to preserve investments. A week later, it jumped up almost 3x for a period of time.
The Advisor, its principals, officers and employees (and members of their families) and affiliates may participate directly or indirectly as investors in the Advisor’s clients, such as the Funds. Thus the Advisor may recommend to clients the purchase or sale of securities in which it, or its officers, employees or related persons have a financial interest. The Advisor may give advice and take actions in the performance of its duties to its clients that differ from the advice given or the timing and nature of actions taken, with respect to other clients’ accounts and/or employees’ accounts that may invest in some of the same securities recommended to clients.

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.

Paul Krugman, Nobel Memorial Prize in Economic Sciences winner does not like bitcoin, has repeated numerous times that it is a bubble that will not last[110] and links it to Tulip mania.[111] American business magnate Warren Buffett thinks that cryptocurrency will come to a bad ending.[112] In October 2017, BlackRock CEO Laurence D. Fink called bitcoin an 'index of money laundering'.[113] "Bitcoin just shows you how much demand for money laundering there is in the world," he said.

Like all investments, investing in any of the Funds entails risks. The risk factors most likely to have a significant impact on a Fund’s portfolio are called “principal risks.” The principal risks of each Fund are described in the applicable Fund’s Summary Prospectus and additional information regarding certain of these principal risks, as well as information related to other potential risks to which a particular Fund may be subjected, is provided below. Some risks apply to all of the Funds, while others are specific to the investment strategies of certain Funds, as indicated below. Each Fund may be subject to other risks in addition to those identified as principal risks.
ProShares Ultra, Short and UltraShort FTSE China 50 and ProShares Ultra and UltraShort FTSE Developed Europe are not in any way sponsored, endorsed, sold or promoted by FTSE International Limited (“FTSE”) or by the London Stock Exchange Group Companies (“LSEG”) (together the “Licensor Parties”) and none of the Licensor Parties make any claim, prediction, warranty or representation whatsoever, expressly or impliedly, either as to the (i) results to be obtained from the use of the FTSE China 50 Index
The Board has not adopted a policy of monitoring for frequent purchases and redemptions of shares that appear to attempt to take advantage of potential arbitrage opportunities. The Board believes this is appropriate because ETFs, such as the Funds, are intended to be attractive to arbitrageurs, as trading activity is critical to ensuring that the market price of Fund shares remains at or close to NAV.

There may be circumstances outside the control of the Advisor, Trust, Administrator (as defined below), transfer agent, Custodian (as defined below), any sub-custodian, Distributor (as defined below), and/or a Fund that make it, for all practical purposes, impossible to re-position such Fund and/or to process a purchase or redemption order. Examples of such circumstances include: natural disasters; public service disruptions or utility problems such as those caused by fires, floods, extreme weather conditions, and power outages resulting in telephone, telecopy, and computer failures; market conditions or activities causing trading halts; systems failures involving computer or other information systems affecting the aforementioned parties, as well as the DTC, the NSCC, or any other participant in the purchase process; and similar extraordinary events. Accordingly, while the Advisor has implemented and tested a business continuity plan that transfers functions of any disrupted facility to another location and has effected a disaster recovery plan, circumstances, such as those above, may prevent a Fund from being operated in a manner consistent with its investment objective and/or principal investment strategies.
The most common way to trade in Bitcoin and other cryptocurrency derivatives today is through contract-for-difference (CFD) contracts. These CFD contracts are usually traded over the counter (OTC), meaning that they are not traded on exchanges but directly between participants. Due to the high volatility (exceeding 1.5-2x std from the mean) most of the OTC platforms do not provide leverage on bitcoin and other cryptos CFDs.