I would look at Elon Musk when he is at his best, at his worst I don’t know if he is Caligula, Nero or King Zhou.
Note plenty of richies invest in projects that don’t really go anywhere like “Breakthrough Starshot”. Myself if I had Musk’s money I don’t know if I’d rather build one of these
(Was lucky to meet the author, that guy has written papers on so many near science-fiction energy sources) or buy an island and start breeding really big ostriches (Jurassic Park) or try to teach sign language gorillas to teach sign language to their offspring or something like that.