What country uses sovereign currency?
I'm curious to know, which country utilizes a sovereign currency? By sovereign currency, I mean a type of money that is issued and regulated by the government of a particular nation, and serves as the primary means of exchange and unit of account within that country. Is there a specific country or countries that stand out in this regard, or is the concept of sovereign currency widespread across the globe? Furthermore, what are the benefits and drawbacks of a country having its own sovereign currency?