But I think there would be some who would try to consider this if they have some easy way to convert their crypto into cash or the other way around.
This seems to be an important issue: From what I read in the thread so far, the few people who really live bankless (or almost bankless) deal a lot with traditional fiat cash. It's also the experience I see in my country: There are several older people here who still live almost 100% on cash - so they could be called almost "bankless" people, with one exception: they get their pensions in banks, so they depend on them.
But what's important for our thread here is that services that convert cash to crypto and vice versa are crucial for the "unbanked". So maybe a list of cash-to-crypto exchange services per country would be a good idea. There are already lists for Bitcoin ATMs, but these are only available in some countries and often have KYC procedures which are not easily fullfillable by people without access to a bank account.
Obviously, a decentralized cash-to-crypto network would be even better. We have LocalBitcoins and other platforms for that, but a thing many people worry about are robberies and scams. And people who sell and buy Bitcoin via personal encounters only are available in few cities. So the challenge remains how cash could be delivered without having to rely on personal encounters. There are ways to
mail cash (via traditional postal services and specialized services like Western Union), but in some countries they're unsafe.