People follow him because he is the biggest man in cryptocurrency What he says happens. Is one of the people and when he speaks it is clear and easy.
He is a successful man in cryptocurrency The coin he talks about gets his price up. a few days ago he tweeted about dogecoin and check his price where are you. I think that's why people follow Elon Musk.
I wouldn't make such loud statements about the success of Musk in crypto currency world. He is a rich man, but he is not an expert in crypto, he did nothing successful in crypto for today. He is making some steps nowadays only towards the crypto and Bitcoin, but people who do not make deep analysis, just like the beautiful picture and need to believe someone. That is why people in most cases find some rich person and follow his or her words or thoughts forgetting about his or her own thoughts, strategy or plans.