What can you buy with Bitcoin in Belarus, Iraq, Iran, Congo, Sudan, Sierra Leone, Zimbabwe, Syria? If people living there don't have a bank account how will they sell their freshly acquired coins and convert to local currency? Do you know if they even actively use Bitcoin at all there?
The answer is even simpler than it seems. In these countries, you can buy dollars if you have a Bitcoins. I think explains not continue. Everyone knows how to spend the dollars. I understand that in any case, we return to fiat money but no country has not yet fully passed on cryptocurrency. Prior to that, very far away.