You have rich experience in everything OP. I also tried stocks but it doesn't give the profit I want like in crypto. Cryptocurrencies are a beast when it comes to multipliers so I hunger for more btc and altcoins more than stocks. I was very close on getting rich on crypto in 2017 but I was so greedy and dumb.
Obviously, crypto trading is still best among all these form of trading, I have had experience in virtually all forms, for forex, I was making profits too but I cannot remember the last time I traded forex, although I will always be grateful to forex for the experience it thought me which I have been able to successfully apply to my crypto trading and it has been wonderful all along.
Whatever experience we gather now cannot be a waste, it will always work for one or two things in the future, so like OP said, we need to really have experience in trading and have lots of strategies too, especially those that are just getting use to the cryptocurrency arena.