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.
Of course people will follow Elon Musk, because Elon Musk is a very popular and very inspiring person. The people who follow him will want to become like him in the future, so whatever Elon musk says, there will be lots of people who will follow him.