Cryptocurrency is all bad.
Cryptocurrencies immediately self-organize into Ponzi schemes from the moment they are created, because when you create a speculative asset with no value other than speculative value, a Ponzi scheme is all that it can become.
The necessary incentive structure exists right from the start: people will want to buy low and sell high, but the asset’s value is entirely imaginary (unlike that of land or gold, for example). So they speculate until the bubble pops and everyone tries to cash out in panic, and because the asset’s “value” was literally 100% bubble-hype and 0% tangible economic value… well, that’s a straightforward description of every Ponzi scheme ever.
I got in a discussion about this with another forum user here; rather than rehashing any more of what I’ve already said, I invite anyone reading this to check out the exchange as it happened: https://forum.effectivealtruism.org/posts/dQuaxGRkvEDXQLSNm/?commentId=ir9ihgeBkx4NTAvGD
One obvious tangible solution: legalizing dense housing.
On top of all the ecological, economic, and health reasons why we already need to do that, low-density suburbia puts physical distance between everyone, preventing us from forming relationships. We could place special emphasis on housing projects that include communal hangout areas/recreation facilities, as well as old-fashioned community centers.