Two options off the top of my head: 1/ Use the CBOE or CME futures for this. Just need to signup with a broker and sell a contract. 2/ Borrow BTC frome a holde

Two options off the top of my head: 1/ Use the CBOE or CME futures for this. Just need to signup with a broker and sell a contract. 2/ Borrow BTC frome a holder. Agree to pay some interest. Then sell that BTC.