For being decentralization of crypto currency, any one can use it from any corner of the world. Day by day crypto currency is spreading all over the world and people are getting advantages from it. When people get advantages, they care it for its growth. In upcoming years, uses of crypto currency will be growing rapidly.
We are heading there since adoption and recognition do really increase day by day but people should be at least realistic whenever we do talk about on the matter of becoming a global currency which do people even claim that it could replace fiat?
With these words alone then you could really tell that it wont really be that possible considering a decentralized thing could really take over on what we've been using through ages.
Its not bad on being optimistic but we should really be that realistic as well and minding off on things which is likely to happen and which is not.