Considering their followers are worshipping them, I am not surprised that many of them fall for this. Remember when Elon Musk was really popular in crypto? Yeah, he was like a news in this forum a lot. Many investors went crazy and went all in to whatever coin he was mentioning into his tweets.
Just because someone rich and made a tweet of him investing into something makes his followers think that they are going to end up like him.

Following these rich dudes won't make you rich. Surely they have that dirty secret of being successful which is "by luck".