If these schemes with inherent MLM-Ponzi structures crash, how long will mining be lucrative enough? Perhaps then mining will distribute to the holders to try t

If these schemes with inherent MLM-Ponzi structures crash, how long will mining be lucrative enough? Perhaps then mining will distribute to the holders to try to maintain some value or use? But you conclude with your worry that there are real costs, and zero pitch decks or white papers I've seen include arguably the most important competitive factor: cost of "how people do it now" vs. cost doing it "this new way;" and in-person, real life networks of trust networks has been how we've become as successful as we have as a society - and so works quite well - and doesn't inherently lineup with "trustless" propaganda of these popular blockchains; if blockchain is a valuable tool, say for legal institutions, they could create their own and run it themselves under agreement.