i think that bitcoin will become an internationally recognized currency in a few decades, after that most of the people will use it
Isn't it already an international currency? I mean you can buy a lot of stuff from around the world using btc.

but it will take some time for it to get into mainstream.
What are you mean about the international currency?an international currency of the digital world?that's right. but for a real life?that is nonsense, kill the fiat and gold before announcing be an international currency in a real life.