Bitcoin’s options market is large, liquid, and (at the moment) unusually concentrated. Total open interest stands near $55. 76 billion, with Deribit carrying $46. 24 billion of that stack, far ahead of CME at $4 source: https://cryptoslate.com/bitcoins-55-billion-options-market-is-now-obsessing-over-one-specific-date-that-forces-a-100000-showdown/