BTC isn't a stable currency in case you haven't noticed. Do you actually have evidence of BTC being used as currency in any of these dysfunctional countries you talk about or is it just a supposition that you're making?
In Venezuela, BTC is heavily restricted towards friends of the regime, for whom it serves similar experience as having hoards of "hard foreign currency" did in USSR...
They say nobody uses it but a "tiny minority". So basically what we already knew, BTC adoption as a currency is anecdotal even in those dysfunctional places where according to its proponents it's particularly suited for.