Like when I sold 2 BTC at the first peak in ~2013. Oops.
BUT that $1200 represented a 400% gain, paid my rent (which I was short for), and it took almost 5 years for bitcoin to come back to the same value. Would it have been better to wait until 2021? Yes. Was it a bad decision? Not at all.
I don't play poker, but it's interesting there that the right play (because sound statistically) can make you lose the game. Over time a player that makes better decisions will come out on top.
It makes me think sometimes about how the right decision can still end up exploding in your face: it was the best decision with the information at your disposal at the time.
Risk of ruin doesn't apply in poker decision-making except in the "metagame" (ie which stakes you play and how much you actually put on the table etc).
In hands themselves poker is played for "table stakes" (ie in a given hand you can only lose the chips that are in front of you at the beginning of that hand). Because of the table stakes rule, avoiding risk of ruin in poker is literally as simple as keeping some money as cash and not putting it on the table.
The thing that happens in movies where someone makes a bet their opponent can't call so they throw the deeds to their house/title to their gold mine/keys to their car into the pot literally can't happen in poker. You can only bet what you have on the table at the beginning of the hand and if you call all-in (all those chips) you get to see the hand to conclusion regardless of what the opponent bet.
BUT that $1200 represented a 400% gain, paid my rent (which I was short for), and it took almost 5 years for bitcoin to come back to the same value. Would it have been better to wait until 2021? Yes. Was it a bad decision? Not at all.