For example, say a Bitcoin is bought for $30,000, and a $31000 covered call on the same is sold for $90. If this covered call is exercised, then a total of $31,090 is received. Even if the price of Bitcoin only rises to $31,050, a total of $31,090 will still be received. If the investor is willing to sell Bitcoin at this price, then the covered call helps target that objective, even if the price of Bitcoin never rises to that level.