I will tell you how we know. There is a correlation between Ivy League graduates flooding Wall Street and an inevitable market crash. Why? Because they can't help themselves but come up with exotic trading (read: gambling) instruments that no one understands and then torching a whole sector for profit. See: the 2008 housing crisis. I just rewatched the Big Short. It's absurd.
Well, now we have Web 3.0. It's the same type of people, creating new devices of gambling, cleaning out the laymen. Tired - NFTs, wired - Soulbound tokens.