As far as i observe, bitcoin have been influenced the world economy since most of individual takes the bitcoin as a source of their funds. that is my main reason why we can consider that bitcoin had influenced the world economy. And it is not impossible to make bitcoin as the main currency in whole world since almost are use this kind of digital money there is nothing impossible that could happen soon in our whole world. We have expect more things about cryptocurrency specifically bitcoin as the main source of all human beings.