Its possible that bitcoin is accepted on some countries simply because they believe that bitcoin is obviously the next medium of exchange, we are now living in a modern age where people are familiar with internet and computers are used daily.
Bitcoin have many advantages that is why it was now accepted worldwide, the heightened degree of privacy may find more comfort for commercial and financial transactions. Also, transactions made without the involvement of a third party. Its for the benefit of the users. Lower transaction costs,increased privacy and no erosion of purchasing power due to inflation.