The main currency bitcoin is just starting to become in El Salvador, and then from September. However, there are already fears of the imposition of international sanctions and international banking structures as well as interstate bodies have warned the government of this country about this.
If the current experiment in El Salvador is not successful, it is unlikely that any country will repeat it. However, this is not what bitcoin should strive for. He needs to become a full-fledged means of payment along with the national currencies of states and not try to replace them, and this, unfortunately, is not happening yet.