I didn't say crypto was a scam, but it is regarded as a scam in general and as you said, it's pretty easy to get scammed trading it or using it if you don't know what you're doing - which would definitely be true for anyone buying in on a public figure's advice.
It's also an incredibly volatile market which is relatively easily influenced by large players without much regulation. If he does have the influence to manage to impact it, I am pretty sure he would happily take his gains from his followers. If he doesn't, well let's just hope all the people who buy in without any research don't lose their money by selling as soon as the next crypto winter comes for a massive loss.