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"
I am completely disagree with the statement that no country has still approved bitcoin because there are, I guess, 8 countries who has legalized cryptocurrency in their nation and people there are using cryptocurrency for their daily basis transactions. Though cryptocurrencies are being in rumors and now people are hesitating in investing into BTC but it doesn't mean that it will end up very badly because it has a very bright future ahead. and in 2018, 2nd richest man "Warren Buffet" said "bitcoin will end up badly"