I think this is exactly what drives him.
I am ashamed to admit if I had the money he had when 24, I would have retired to some exotic places or relentlessly travelling the world.
Hes instead running two of the most disruptive firm in the world working 80 hours week.
Im not ashamed to admit that I would have retired too.
Some people need to be on the go all the time, its what keeps him relatively sane probably.
I wonder if I really could retire if (when) BTC hits $100K. It's a nice dream, and I'm sure it'd be nice for a while. But I'm pretty sure I'd go nuts unless I found some kind of project/job to take on.
Designing and building my own house could be one such project. Always quite fancied that... Grand Designs has a lot to answer for.