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"
Why Bitcoin need any approval from any country?
This currency is not for the government nor banks, Bitcoin created for the people to get and have the currency that will depend on the people all around the world.
and without any approval, as the world have democracy we can make this coin alive as always.