The sovereignty of a country is also determined by its independence, which can be exercised without interference from other countries, including determining its own currency for the country's economy.So it is not easy to intervene in a country's sovereignty by changing or not recognizing its own currency, unless they are colonized and used as a source of war.but until now nothing has happened, and nothing has ever happened with that, other than perhaps providing flexibility for the use of US dollars, etc. to be accepted and used as a legal transaction.
What you say is not wrong at all because each country has its own sovereignty accompanied by complete independence as long as the country is not in a state of war. But it will be a different story if the country is facing war, so as long as the country is still safe enough, I think the country's leaders can still do something that can bring benefits to the country. As well as doing our best to rebuild its currency so that its citizens can experience proper progress like other citizens.
Almost many countries do not have sovereignty because they all depend on the US dollar. So there doesn't have to be a war before the sovereignty of each country is destroyed, without war America can take sovereignty in every country. It can be seen that currently each country has its own currency, but why do international transactions have to use dollars? Does this include sovereignty in a country? I do not think so. The solution is that each country should have its own sovereignty, each country should use Bitcoin as an international transaction. However, many will reject this, so it is not surprising that many countries want to drop bitcoin because they are afraid of bitcoin that they cannot control.