I don't think an inverse ETF would be very successful today, it's another way of betting down against Bitcoin but those who do that stand to lose. It could probably be useful in the future, I'm not saying it won't, but you won't see me buying ETFs, inverse or not, I prefer the real Bitcoin, although I suppose it will be successful among a certain type of public.
Yep, for me its buy & HODL, buy & HODL. I have zero interest in anybody else holding my bitcoin for me or any kind of long/short trading via an institution. Break out of the fiat, government monopolisation of money, buy bitcoin.