I'm kind of obsessed with him!
It's not just the broad base of knowledge that he has, but those bets... Oh my goodness, I cannot imagine betting the amounts that he does. But I guess that's true of most people and since he's a professional gambler, it doesn't trouble him one bit.
I find it so interesting that he studied a lot of topics using children's books. It makes perfect sense because books for kids get into the "meat" of something without a lot of exposition like adult books do.