It's good that there are countries already that accept bitcoin as a payment because the charge that is putted there is not big however i think that the there are countries that won't agree the idea of using bitcoin as a payment system. So as long as there are countries that disagree with this idea bitcoin will stay as it is. Aside from that, people will choose tohold their coins instead of using it as their payment.
Bitcoin decentralization could be the number one factor for most of the countries to do not to accept bitcoin in terms of transactions. It means no form of government or institution have the rights to have a part to check on bitcoin transactions, people identity and transactions purposes. Simply bitcoin could be used in illegal matter which the government not want to happen on a specific nation.