Talking about African countries, there are certain countries like Nigeria where the use of Bitcoin for transactions are not considered legal. If you are making a transaction, you'll just have to try all means not to make your bank know that it's for cryptocurrency purposes or else your bank account will be flagged. With such system, I don't think Nigeria will be on such list anytime soon because they are not even showing signs. I really don't know much about other African nations but speaking of Nigeria, the government itself is against the use of Bitcoin. The only ways you can transact is either P2P or you carry out your transaction and write something else on the transaction description because anything that relates to cryptocurrency will automatically flag your bank account red.