For Bitcoin to be adopted as a legal tender, off course it must go through certain processes, but these processes are not ambiguous to say the least. Countries like El Salvador and not so recently The Central African Republic are Trail Blazers in the aforementioned. Looking at it realistically, the merits would certainly alleniate any demerits that may occur. It surely puts innovation where it should be on a pedestal, foreign cash injection becomes and the global phenomenon; inflation can be better managed. What is holding back is definitely from constituted authority, as households and individuals already accept Bitcoin in some forms as a legal ten. What is stopping it's gradual integration?
I honestly think it will be unwise for a country to make Bitcoin a legal tender, cause of, 1. High volatility, 2. Transaction fee, 3. Not regulated, 5. Difficulty to use.
Yes they do have ways to curtail inflation, but it can also lead to more cyber theft which will pose a security threat to a country, yes it reduces centralization, minimizing control but in the real world, it is not just realistic.