It’s important to realise that you need to do your own research and come up with your own strategy for cryptocurrency trading. If you are short on time and want to play it safe; the easiest cause of action is to simply diversify into several different coins and then wait a year or more. However, if you want to maximise profits you should learn how to swing trade cryptocurrency.
Those who believe in Cryptocurrency claim it to be the next big thing in the history of mankind. The mere fact that Cryptocurrency is beyond the control of any government body gets it a lot of eyeballs. Imagine a universal currency beyond the control of liquidity, inflation and government subsidy. This would mean that the commercial activity of economies working on Cryptocurrency shall be privatized absolutely.
To illustrate the point, recall that futures markets are just counterparty contracts. Let's say I want to SHORT the market and profit off a decline in BTC/USD. If I put an order to sell Weekly futures contract at $400, and someone buys that offer, then we have created a futures contract. If it goes down, I profit and he loses, if it goes up, he profits and I lose. However, what if price goes down really fast, and my counterparty only had a little margin backing his position? Well, he gets margin-called when it goes down enough, and the system takes his contract and forces it to be sold to a different counterparty that wants to take the LONG side of my contract.
Inverse bitcoin contracts are usually denominated in USD terms. So if there's a contract value of $100 then each side -- LONG and SHORT -- puts down some portion of the contract value in margin. The contract is an agreement between traders to pay the other side an amount of bitcoin profit/loss as the price changes. Each contract has an expiration date, and some exchanges have periodic (daily or weekly) dates where the contract period's profits are "settled" even if the contract has not expired.
Now let's say that both traders simply hold the January 9 contract to expiration. If price settles at 440, 10% higher, then Bob will get a 50% return on his initial margin (+0.1btc, 5x leverage enhances his 10% gain on the notional 1 bitcoin of the contract) and Ann will lose 50%. (-0.1btc). This is one of the most powerful parts of futures: higher leverage means higher returns on your trades. The leverage feature is essential for hedgers and speculators trying to get the most out of their capital when managing risk. And better yet: you don't pay daily interest or any margin fees on this leverage with bitcoin futures!
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.