It kind of was the subject. The person I replied to up thread was clearly implying that rich people making investments is a net benefit to everyone, and if they were all acting like VCs, maybe, but since they are mostly locking up their investments in mutual funds or real estate, its less clearly beneficial.

Yes, a lot of economic activity is predicated on the availability of investment capital, but only investing in already-successful firms doesn't generate new economic activity. And static, unused real estate generates basically none at all.

Again: Bezos's wealth is readily convertible to money. It is not a critical distinction for him.