As we can see at the moment, there are already examples of creating its own crypto currency in the country, as Venezuela created its state crypt currency called Petro. Perhaps in the future the number of countries and banks that will create their own crypto currency will increase, because the industry is developing rapidly.
Cryptocurrencies that are created by local countries will not grow and the price will be depending on its developers so you should just invest on a token with decent reputation in the community.