i think bitcoin is already an international currency because i see that nowadays bitcoin is acceptable in everywhere and bitcoin transaction is very faster than other currency and we can say that bitcoin is already international currency.
I agree with you could see bitcoin users already spread all over the world, almost every country may have bitcoin users, it means bitcoin can be used in all countries, and it proves that bitcoin is an international currency
yes its true but its not mean that bitcoin is already accepted in offline because until now only few country that want to receive bitcoin as payment and we only the ATM machine on that country but for offline store, i think its only few place in the world. so i think its more than 5 years later we will see that bitcoin will be use as international currency.