Also, the central banks of those countries would be fiercely opposed to anything involving bitcoin, since that would hurt the banking systems in those countries.
Despite that, it also would hurt the economical development of those countries. Fiat currencies are inflationary what is needed for development. Bitcoin however is highly deflationary, what means it is more worthy to hold them, because it can be expected that its value is more tomorrow than today. This will lead to a downfall of consumption and collapse of the economy. Bitcoin is good to be a value storage but not as a daily usable currency to pay bills with.