Bitcoins are not issued, endorsed, or regulated by any central bank. Instead, they are created through a computer-generated process known as mining. In addition to being a cryptocurrency unrelated to any government, Bitcoin is a peer-to-peer payment system since it does not exist in a physical form. As such, it offers a convenient way to conduct cross-border transactions with no exchange rate fees. It also allows users to remain anonymous.
The following countries say no to bitcoin: China, Russia, Bolivia, Vietnam, Coloumbia and Ecuador