To be fair, having a lot of money is an excellent way to have more money. Having a lot of money and making some lucky gambles in early technology plays is an even better way to have a lot of money. The fact that every company he owns a significant stake in has a 'manage Elon so that everyone else can get things done' team except for twitter and all of them are not doing insane things, except for twitter, seems to be a pretty strong indication that other enterprises he's involved in are not succeeding because of him, but in spite of him.
"Manchilds" track record in this Game of Life is by and large a testament to how well he understands its rules. And, maybe, how silly they are.