I think forex and crypto are waay too different from each other to make that a possibility. First of all there are regular people doing forex and almost always they lose money there, not initially maybe (some lose right away, some lose later) but in the end if you are not a professional trader there than you will lose your money.
One of my friend's uncle was interested in forex and made a ton of money for a long long time, like couple years at least and than one day lost all he had in his savings account, it can take a long time before you run out of luck but it will happen. The reason why banks and professional forex traders do not lose like that is because they have a lot more capital than you, if you lose 100 thousand dollars in forex you run out of money probably, they can reinvest 500 thousand to get that back. That is why they succeed.
Crypto is not like that, most of the population here is not professional traders, its people. Professionals are not here yet.
The main reason seasonal traders do not end up losing a lot is because asides from having a lot of money, they actually know how to manage risks as well and they are not gambling their positions in the market. Talking about your uncle, the only thing I can point here is that he approached trading as a gamble with no strategy, got lucky at first and then reality kicked in and he ran out of luck.
What makes a professional trader one is their ability to be able to take advantage of the market, but even if you want to do that, you only need to have a good strategy and know how to execute it perfectly well without emotions and if you have none, you will definitely be screwed.
