No doubt billionaires work hard to get there. And no doubt it is a hard task.
I guess part of it is why care about how much money you make anymore? If you care about "score" it seems odd to compare your assets when you can compare your companies' value. Because you can't actually do anything with that money in your bank, and the company's value is a more meaningful metric as to your "value." I think Jensen's rise says a lot more about his value than the $80B in assets or him being in the top 20 richest. (golden handcuffs aside) In that respect Jensen is doing much better than Musk or Bezos. Of course there's tons of metrics to consider but just using this to help ground a talking point.