Bitcoin futures and options are margined as a portfolio, providing greater capital efficiency. There you have it, options on Bitcoin futures, another option to manage bitcoin risk or speculate on the price of bitcoin.
Yes, there are. Bitcoin options exist: Similar to Bitcoin futures, they're a form of derivatives. They can be defined as "contracts that give an investor or trader the right to buy or sell Bitcoin (but not the obligation) at a given price (strike price) and a specific date (expiration date)."