You dont become a billionaire without being obsessive over wealth and power. It is a mental illness. Yes you will occasionally come across decent billionaires and those are the ones who end up giving away 99% of their wealth, something you will never see types like Elon or Trump ever do. These people have identified a finite resource and want to horde it all for themselves. More for them, less for you. Why? Who the fuck knows, they just like seeing the numbers go up I guess. They like knowing they are untouchable, and like that they can influence things that regular people cannot. They start to believe they are geniuses who are infallible and surely their ideas and opinions must be more than that; divine inspirations that must be shared with the world, through any means necessary.