I used to work for a guy who was early and fairly high up (but not founder level) at a DotCom 1.0 company everyone has heard of. I'd conservatively guess his net worth was high 8 or low 9 figures, and he was easily the most driven person I've ever met. Was one of those people who you wondered when he slept (and frankly, how he ever managed to get or stay married). Raced yachts for a hobby, that sort of thing.

I think about that, and then I wonder how driven someone who's worth multiple thousands of times what that guy was worth must be.