Certainly, bitcoin is becoming a world wide currency, and will grow bigger in the future. Half of the places I go now, all except bitcoin. 
I guess that's a good thing for us investors. BTC
Bitcoin actually so far is already a global currency. Because, there are some countries now who accepted bitcoin as their legal currency like in Japan, now China is next, then in Africa there are planning to accept it too, also in Israel, then in Australia and Europe so it is considered as international global currency. I guess that's a good thing for us investors. BTC