Even billionaire geniuses sometimes do their own laundry. I'm addicted to Shark Tank, and there's an episode where Mark Cuban talks about doing his own laundry. While I like Mark Cuban, and he is apparently a billionaire, I would actually be more comfortable comparing somebody like Elon Musk to Tony Stark aka Iron Man. However, I'm not sure if Elon does his own laundry. That would be the ultimate proof that Elon Musk is Iron Man.