Even with all these big institutions entering the blockchain industry, I do not see how that would make bitcoin to become the only single currency used worldwide. Firstly, most of the points mentioned by the OP obviously show how monopoly is already present in the system and of course, even without that, I do not expect any country to even get rid of fiat in the first place for bitcoin.

Nevertheless, I know there is still a huge way for bitcoin to go but I wonder how things would pan out before then will be deciding how effectively bitcoin may become a global currency. Unlike gold or USD, bitcoin will become a everybody's global currency. I mean we may directly use bitcoins for international transactions and local transactions as well.