Im sure you mean, why countries DONT accept bitcoin in transactions?
because at the moment only a handful of countries have recognised it as a form of payment,
but not to replace any fiat currency.
I can understand some peoples thinking that if and when bitcoin is regulated by countries maybe there is a chance it woild be accepted as legal tender but i cannot see it happening.
Countries will simply create their own regulated crypto.
very true, there are still many countries that have not approved bitcoin as a legitimate payment instrument in their country, first bitcoin cannot be regulated and supervised by any party, so for countries with very high crime rates it is very potential for money laundering, the second reason to keep the eye the country's own money, the three financial systems of the country have not supported and have not been well integrated.