you should stay far away from those who claim they were right about a random prediction like the "top" because such people are scammers who have no understanding of the market. their success was out of pure luck and their claims about being "correct" is purely to gain more followers whom they can scam.
your advertisement of a youtuber is also shady!
Although I agree you were right about the part that most of them are just lucky enough to make some profit but I don't agree the part where most of them are scammers/correct about hitting the correct price since no one knows about the exact price and I don't think being a youtuber will have to do with scamming people if they are legit youtubers except with those who are part of the group signal where they play the market with their followers/members just to gain/take advantage.