Something that tends to be underappreciated is the risk associated with contemporary mobile payments solutions. Both the individual and the local economy become incredibly reliant on a small number of private companies.
For more well-off individuals who can spread their risk ad easily switch providers, this is much less of a practical risk and therefore are likely to shrug off. They also tend to have access to providers with human support and better platforms.
Consider also that for multi-national providers, they become affected in new ways to foreign domestic and international policies and politics.
These are just some ways in which people become serfs, at real mercy of the whims and fate of politics and businesses.
Last week, thousands of people who had Coinbase accounts in Japan are now forced to close them due to them now only being available for Japanese citizens (as opposed to residents).
This is probably not more than an annoyance for most of those affected, but transfer that to migrant populations and mobile banking in Africa and things get dark pretty quickly.
Cryptocurrencies (when done in a way that liberates the user as opposed to being wrapped in centralized fintech) break this dynamic completely.