I’ve thought about it many times.
What would I do? I think if I made that much money over time, it probably means I’m already doing a lot with it. No need to start a new business at that point.
I currently donate to several non-profits every month that are doing great things in the world. I’d definitely be able to amp up my giving with a billion dollars. I kind of want to start a non-profit already, so if I had that kind of money, I hope I’d have started that by then as well.
I wouldn’t necessarily donate to large non-profits either. I think helping many smaller ones grow is a far better use of that kind of money.
As far as business goes, I’ve wanted to produce movies for some time now. I’d probably try that at least once or twice in the $10M to $60M range, depending on the project.