Well your story isn't exactly unique, so no point crying a river about it. All those involved in crypto from c.2016 made massive paper gains , but only for a very short period. Unless they had the blind luck to cash out at the peak, they just have to suck it up and not think "I was once worth x amount for 2 weeks..." Torturing yourself with benefit of hindsight will just fuck you up. You can't time the market, so don't bother trying.

It sounds like you're still sitting on a pile of crypto, so if your hands are strong enough, forget about that $100K for 3-5 years, and then sell of a part of it in mid 2020s. You'll be doing alright by then I think.