yes, why not. if all country around the world accept bitcoin and make it legal
bitcoin can change fiat money or other currencies because bitcoin system better than fiat money
and all around the world can use it
Well, you can't convince all the world to use it. The countries in the world are not the same. Some might use it and some might not. Fiat system is still better and maybe bitcoin just have few advantages over the money but not totally.
Bitcoin is not the future money, for the reason of very limited supply. Bitcoin does create the technology for future money. I think at some point central banks will create cyber money on their own.
True, supply might not be enough for the whole world to use it as main currency. But for sure the technology it has is one of the model that will be used for the future money in the internet/web.
