Bitcoin was launched in 2007. It's 10 years and still, no country has approved Bitcoin ?? 
and in 2018, 2nd richest man "Warren Buffet" said "bitcoin will end up badly"
each country must have many indicators in deciding whether or not the country receives bitcoins.and in 2018, 2nd richest man "Warren Buffet" said "bitcoin will end up badly"
One of the countries that I know has legalized bitcoin is Korea.
The Korean government's decision to grant permission to bitcoin users in the country of course with a variety of rules that must be met.