True that - Elon is just the most glaring example.

Most, maybe, but off the top of my head, I can think of two easy counterexamples:

• Warren Buffett’s wealth is in diverse investments; it’s only inflated insofar as the entire stock market is overvalued
• Gabe Newell’s wealth is almost entirely in Steam, which isn’t even publicly traded so can’t really be overvalued by “hype”