The FAQ section below should answer all of your remaining questions. Buy Bitcoin Worldwide does not promote, facilitate or engage in futures, options contracts or any other form of derivatives trading. You must sell using either a bank account or a USD account that will hold your money on Coinbase. Coinbase Pro is geared towards more advanced traders, who enjoy instant transactions and plenty of volume, as Coinbase Pro is one of the most popular exchange platforms. So if the value of the currency you bought goes up over that time, you will have made money. Any two of the three keys allows spending of funds.