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"
you were wrong. Japan and Germany have officially accepted Bitcoin. In the future there may be more countries accepting bitcoins after seeing the economy of Japan and Germany has grown very fast because of Bitcoin. I look forward to seeing that happenand in 2018, 2nd richest man "Warren Buffet" said "bitcoin will end up badly"