Edit: I think in the kind of countries that GP mentions, access to stable foreign currencies will be very restricted, especially during times where the country's native currency is in crisis.
Because the government is corrupted in my country and at any time they can seize my money or fix currency rates. Crypto, even in its fluctating nature, is safer than either my country's currency or keeping USD/EUR etc in a bank here (and I don't have any other option).
Edit: I think in the kind of countries that GP mentions, access to stable foreign currencies will be very restricted, especially during times where the country's native currency is in crisis.