If all countries can accepted crypto currencies in there various countries, as a means of payment and as a means of online exchanges, such as money is, money is anything use as a means of exchange and general acceptable. With the means I think all cryptocurrencies (bitcoin) will definitely go round the world, and will be use as a means of exchange. I will be so grateful to the creation of crypto currencies. This will also help our future generation, Remember something when we do international transfer across the countries, it may take a while to get the money to your local bank account, but with cryptocurrency you can get instant reflection if bitcoin etc is transfer to wallet,And you can make use of your coin (bitcoin ETC).
bitcoin has already around the world though in many countries it is not accepted yet people of those countries still accumulating Bitcoin for Holding.
also Bitcoin can be use as transaction material.
and also converting into Fiat is so easy(well that's in my country) that you an just send the amount into your detail and the Money can be picked up in each branches of Money order company.
but i know in other countries bank account is a must before converting your bitcoin into currency.