I think Bitcoin is already international currency.bitcoin is a Crypto currency, we dispute it into dollar and we use it anywhere and we have no difficulty in it.It is as well as easy to pay and have some transaction via your Bitcoin wallet and that is utter of the wallet.we just need a tiny more period behind the halving in my eyes than its possible.
Yes seriously u need to consider bitcoin as one of the most strongest currencies which are used in today's market as a currency is valuable only till it's holders have interest in them