It's mildly reassuring that the wealth of these families is mostly the result of industrial activity and not just over-inflated asset valuations.
On the other hand these levels of wealth are dizzying, and it's increasingly difficult to believe anyone's work product could be worth *that much more* than everyone else's.
And yet these numbers are small compared to the valuations of AI companies.
Besides the obvious tech bubble, the dominance of American wealth can be explained by rich people from every country in the world, deciding to invest their wealth in the United States because they know that is the place they're most likely to maintain access to their money if the **** really hits the fan in a global conflict.
Despite the catastrophic current trajectory of American culture, it's still more trustworthy than almost anywhere else in the world.