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 a very high potential of becoming a world currency and I think it is already used in a lot of countries around the world as a currency and a digital currency.
Not all cryptocurrency is going to go around the world as their are so many cryptocurrencies that don't actually have a value. As bitcoin adaptation continues we could see a lot of platforms of the banking system that are already supporting bitcoin conversion that is actually a good sign that bitcoin is being recognized around the world. Bitcoin technology is revolutionary compared to fiat money and it is actually a big jump but still not supported by a lot of countries or government, but as bitcoin adaptation continues it is going to be easy for bitcoin we be used by a lot of people.