☞If Bitcoin was the currency of a country then what will happen?☜
If Bitcoin is the currency of any country in the world, I will do whatever it takes to go to that country. Possibly sell all I own; I can take a loan, fundraising until I get to that country. However, it is only an imagination, only wishing it to be reaslitic at least in the dream world.
Suppose a country began to use Bitcoin instead of their currency. Then, what will happen?
A country can never totally abandon to use their own currency and start using Bitcoin alone. In countries where Bitcoin is legally allowed, there are some individuals that are using Bitcoin for their daily transactions. The government of El Salvador has made Bitcoin ba legal tender but that doesn't mean they will stop using their own currency. So, I doubt if there's any country that will totally forsake to use their own currency even if Bitcoin is a legal tender in that country.
Actually, it will be unwise because Bitcoin is no man-centralized currency. Every country must have a currency that they can regulate within their reach. Bitcoin cannot be regualted. The second point is any country with the same price flauction in the global market as bitcoin will experience two seasons in their economy. Seasons of dryness and seasons of bountiful.