As I can remember, there is a country that tried to make their own digital currency. I do not know what really happened but I think that is not released. Countries will be making their own crypto currency since it is the future of money. In the future we can see digital currencies used by almost all of the people in the world not as an asset but as a common currency.
I see also that other countries really tried to make their own cryptocurrencies and they name it as digital money instead. Maybe they oversee that soon it will run all over the world the cryptocurrencies. Although it happens now a days but only few people knew on how to use it but sooner it will totally implemented by the help of government.