So all you can come up with is some edge cases where traditional banking can’t be relied on? Seems like a very convoluted way of saying that crypto is usually worse than traditional banking.
Also just wait until you hear that if you can buy crypto, you can probably participate in forex as well. I know people who come from countries you describe, and they just use euros or dollars because a highly volatile currency with astronomical payment processing fees is the opposite of what one needs for daily life, no matter how much what the SV techbros wish it weren’t the case.
Read my message again. The optimization is “use euros or dollars (or yuans or whatever is most applicable regionally)”. Your “optimization” is a solution looking for a problem.