yeah, because bitcoin is available in all countries as long as the citizens have internet connection. if a currency can do such thing, we can call it as global currency. besides, it is used in many countries.
Internet facility is available in all countries,but backward countries don't have much knowledge about bitcoin. Bitcoin will become global currency only when they have proper exchanges. Even though they have knowledge about how to use bitcoin, but they need to convert them into their corresponding currency. But very soon Bitcoin will become global currency.
i think it is enough as a sign that bitcoin ready to be accepted as currency globally.
and yeaaa as time goes by , exchanges will come up .