They’re still also statistically pretty young compared to other rich people who got wealthy in their young adulthood. And male. Give young men access to a bunch of money, and the results tend to not be pretty. Day what you will about old men, if they’re reaching peak income near or after 50, they’ve already blown the worst of their testosterone out of their systems - that still leaves ego, which is its own problem, but suddenly coming into money in your youth I believe badly skews your perspective of reality. The culture they obtained wealth in is also important: guys (and gals) who gain sudden wealth in their youth through, say, competitive snowboarding are also going to have a skewed perspective, but their peer group and the lack of the negative influence of Wall Street and investors mitigate the worst of the effects.