In my opinion, Bitcoin is not suitable to be the national currency of a country. Looking at all the ups and downs of its price, Bitcoin’s volatility is too high and too dynamic. Such sharp fluctuations on the scale of a country’s economy can lead to serious risks and instability, which is too risky for maintaining the standard of living for the people. Therefore, Bitcoin is good as an asset, but it is not suitable as a national currency.
Truly, it can only accompany fiat as of now, and mostly be used for bigger purchases in question, if we are not talking about LN and other stuff that may be developed in the upcoming years.