i think bitcoin is not gonna ruin a country but bitcoin will help the economy of a country with giving more benefits to citizen when they use bitcoin in daily life but this is not yet realize by government or they know before. its like using fiat in a country but we have more benefits that we can use it in many places in other country.
indeed the convenience offered by bitcoin is very good and supports the world of commerce, but if the country adopts bitcoin to become the currency of a country there will be many shortcomings that can not be fulfilled by bitcoin, one of which does not provide credit services, while the community now needs a credit system, such as credit housing, vehicle loans and some loans that are already a necessity for citizens, this kind of thing cannot be fulfilled by bitcoin, maybe the right step is bitcoin collaborating with conventional currencies and the bank to equally facilitate all the needs of the community.