On a Human level, I would agree.

Selfishly and pragmatically, I hope he never does; who else has done so much to enable the progress that is needed in the World right now? People like him are a once in a generation, not because he's a Genius (which I think he is) but because of the amount of risk he is willing to absorb and keeping going at all costs and motivating more and more to the cause in the process.

I think Dr. Zubrin said it best: he's not motivated by Money, he's after Legacy and that draws the best efforts of Humanity forward in order to be a part of it. He is an archetype character out several Sci-fi books.

6 Kids is a good shot at Legacy on it's own, but perhaps setting the bar this high for them in his Lifetime and the opportunity to out-do each other after setting the bar so high was the goal.