With Direxion, people are probably going to get rekt with some inverse (bear) 3x (leverage) BTC fund though.  Probably going to break record for a listed ETF going to zero (or splitting).  

Also, it takes a while for crowds used to buy-low-sell-high and pump-and-dump in CB dominated inflationary world to figure out that with deflationary currency, it's all pump-and-pump and sell-high-and-buyback-even-higher as people hoard it to oblivion.