I believe SNT will take many years to derail BTC and others. So I suspect that those investing in BTC mining today will still make their $$ back over the next few years. Pissed or not, this is the nature of investing … missing the boat is all too common.
Edit: read the tweet after lol … yeah, I suppose those thinking BTC is going to drive post scarcity will be disappointed - or rather have something to blame … we are never going to post-scarcity as human wants are unlimited.