Seriously. "I am rich so I don't know how to make a vehicle to make even more money" is so transformatively different from "I grew up without enough opportunities to know how to function in polite (white) society" that my jaw bunched reading it.
This industry makes me profoundly sad sometimes. Often.
I am morbidly curious what you think the point of a startup is if not to transform existing money into more money. Or what you think investors do with regard to those startups.
A startup is about using other people's money as a leverage for your idea/work. An investment is about being on the other side.
A rich guy who wants to make more money in the tech field will be better off doing angel investing, literally getting on the other side of the counter with startup founders.
After all, capital isn't hard to come by these days. Even outside of the Valley. I have raised (and sadly, burned uselessly) money and it was no way hard. So the factor of having money doesn't mean much. Apart from that, a rich guy will have some advantages (self-confidence, ability to take risks, good initial network) and some disadvantages. Among these are poor understanding of audience for most kinds of ideas, pressure from high status relatives ('startups are hipster toys, you have to go to business school'), high opportunity costs. If we look at successful startup founders, very few come from rich families. Also, having to raise outside money provides a reality check, something which a rich kid will code using his own money has a higher chance to become just a toy - facing investors provides validation and feedback you can't ignore. Raising money is something people think is hard, and it's no way fun to do, so they avoid it whenever they can, so someone who doesn't need it will probably not do it. Which leaves him all alone with his vision...
This industry makes me profoundly sad sometimes. Often.