I think it's not just in poker, but it's also in other gambling games. We need to have money management and discipline, so we know the time to get out of the games and saves the rest of the money.
Only in those games where you have hand than you can count (or estimate) probability of winning and bet on that. Only poker and maybe some sort of dice games comes to my mind now. Throw examples what you are thinking of.
If we talk about money management and discipline, then I think it has related to all of the gambling games. But how about sports betting? But I don't know but I think in sports betting, we play with probability too.
Professional trader and poker player will say the same thing: -You loose the most when you are sure that you will win
I agree with this because if we do not realize how much we can make from trading and poker and we still want to make a bigger profit, then gets ready to get a loss because of we can miss the right time to get those profit.
I mean that when you are sure you will win you will bet more and more (in poker when you have Full House not knowing that oponent have Four of a kind) or buying more and more coins even if price is going down unless margincall (in trading).
You will not lose all your money in poker having 5 times nothing in a row. You will lose all your money having Full House.
You will not lose all your money in trading hitting 3% stoploss 5 times in a row. You will lose them all by 1 trade without discipline and money management betting more and more on trade that is not going how it should and you will do this only when you are sure that "big news is comming" or "i'm sure its fake dump" or others.
I will not do that even if I am very sure that I will win. It makes no sense for me to place a higher bet than the money I have in my pocket.
I think in poker, we can lose all at one time if we can't control ourselves and I think it's part of discipline and money management too. This will be the same thing in trading, if we cannot prevent buying one coin with all the money, yes, we will lose that money when we don't know where the trend wants to go.