Speculating and hedging bitcoin with futures has never been easier. Spot has lower leverage which means you have to risk more of your capital with exchanges. Margin fees are very expensive on Bitfinex and Kraken when you are borrowing funds and paying up to 0.1% per day to be in a position. Futures contracts on the other hand have no holding fees associated. You pay a fee to enter the contract, and you pay a fee to exit the contract. Your profit or loss comes from the change in the price you pay.
The Morningstar Alternatives Solution ETF pays ProShare Advisors a fee at an annualized rate based on its average daily net assets of 0.07%. ProShare Advisors has entered into an Advisory and Management Services Fee Waiver Agreement that waives this investment advisory 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.
Note that you could just keep bitcoin on CryptoFacilities waiting to make the trade so you don't have to wait to move the bitcoin you bought over. This is called see-saw arbitrage model, where you keep funds on both exchanges to avoid having to wait. This is fine, but you can't ignore that there is extra capital being used in the play, so it affects your rate of return and capital utilisation. We will not use this method, we will do a full, complete, legitimate arbitrage process.