Diversity. Crypto is only one avenue. In short, people are just trying to find some place to put their money where inflation doesn't destroy it.

And Taleb is 1/2 wrong about land. Yes, it has intrinsic value. You don't really "buy" a piece of land. You borrow at interest from the bank, and hope the property taxes don't go up to much.

It's also a boomer ponzi scheme that your house is worth more every year.