White male supremacy most likely. A society where white males have the same respect and control they used to have and women and minorities know their place.
He’s already the richest man on earth and that has ever existed. So it’s difficult to think it’s about making more money although that can’t be ruled out. He’s probably found that despite his wealth something is still missing and that is likely “more power” and as he’s never going to be an elected politician he’s living out his power trip by proxy. It’s not fun for him to influence policies in a traditional sense, it’s got to be in his own bombastic extremist way because he needs the attention that comes with that.
You nailed it. He even sounds like that kind of person during interviews. " You know, I'm one of the best gamer, programmer and rocket scientist ever?"