In the foreseeable future, each developed country will create its own crypto currency, provided by the national currency.
You cannot be sure of this, and there is no fact that points to this, apparently the only country making such claims happen to be China,i do not see the reason why countries would create it's own cryptocurrency,when they can manipulate their very own fiat currencies..
Technological hype perhaps? Realistically, the primary benefit to a country creating a crypto themselves is the hype/press that they are joining the technical revolution of cryptocurrencies.
Only problem is, I feel like due to the nature of the cryptocurrency market, where-as fiat is considered safe because it's backed by a country, I also feel as if the distrust in the market would have the opposite effect for a cryptocurrency established by a country. The reason cryptocurrency became so popular was that it was more or less out of countries full control.