There was a guy in Toronto at the start of the 19th century. He was so rich he thought he was royalty. He built a huge castle and everything (Casa Loma) and then he had his industries expropriated (hydro electricity, which was taken to form Ontario Hydro) and he went broke and spent the rest of his days living in his chauffeur's house. I hope for something similar for Musk, but he'll have to live in a "self driving" car