Elon Musk is a very famous person in the world. He also has a great influence in the world. I think it is very unreasonable to say that dogecoin is a Pyramid scheme. My point is that if that really happened, then there would be a terrible "domino effect" that would befall Elon Musk including all of his companies. Even though he didn't tell us to buy dogecoin but still, we all know people buy dogecoin because of Elon Musk.