And to think that why would anyone donate to him for some rewards just because of few successful signals?
If he is lucky, then, thank himself he didn't lose his funds. Don't expect that someone will give you some bonus just because you got it right.
And some are already boasting their capability in trading just by few successful attempts.
But if you ask their history, I doubt they will disclose all their losses in the public.
If the OP feels he is good in shorting, why not use such strategy to his own advantage and enrich himself with this strategy?
I guess he is saying that donating is a way of saying thanks for letting anyone to try his signals for free and it works perfectly as he expects. I'm sure that he is also thankful or proud for himself because he is doing well and he is making a profit out of his decent skills in crypto trading. Boasting is different, and if it's true that the OP is boasting, I don't think he will ever ask for donations but in fact, they are the ones who will likely give a tip to someone else.
If you and others want to, you can ask for the OP's full trading statistics, for you guys to see his winning rate, if he is truly a great trader or he is only like the others who is guessing and wants to benefit from the publics tip's. Your last sentence has a point. I can also say the same thing for those who sell a strategy on other activities to make easy money.