Do you guys billieve that bitcoin will become the only one currency that can use as a mode of payment in the whole world? How is this become posible in the future?
As of now i dont think this kind of scenario will happen in the near future.
We must rralize that no matter how popular bitcoin could be there will always be people who will not adopt in technological changes.
And of course not all people in the world has access to this changes. Therefore conventional form of currencies will still exist.