Well, they're here. I think the general consensus on HN is not favorable to DeFi or other crypto projects. The bad smell from innumerable ponzi schemes and outright technical falsehoods is a real turn-off to the crowd that stalks these halls.
[Edit: mimixco edited his post and it's better now although still a strong claim :) .]
But it is clear the vast majority of crypto is just get-rich-quick Ponzi-esque.
I think Satoshi's original use case is one that's viable and has proven to be viable. Another is in blockchain verification of narrative text without access to the text itself, something I built into a programming language for fact verification[0].