finally......There is a liquid (plain vanilla) options exchange operative now. Check out https://www.deribit.com/main#/options.
Our exchange went open for trading yesterday, and we are ourselves making a market..somewhat liquid...trying to make a start somewhere. We do our best to put tight quotes, but we need more traders for some price-discovery.

Options traded are european style cash settled in bitcoin and you can trade on margin. (sell up to 10 calls if 1 bitcoin deposited).
Futures can also be traded on the platform. We have not yet implemented portfolio margin. But its on our roadmap.

Cheers,
John (CEO Deribit)