The only "pure" play I know of is GBTC, and I checked it to see if shares are available to short and they aren't. Of course it doesn't trade options either. You are on the right track with GOOGL, FB, NFLX, PCLN, and I will "likely" have AMZN on my list once it trades thru the 52 week high. My take down of Silly Con Valley, Cali will decimate bitcoin, and bitcoin will decimate the entire crypto sector.