Yes bitcoin became very big globally accepted currency. It will eventually be used even in illegal position in some countries . When it sees socially acceptance from basic users like young adults, it will be even bigger...
of course but unfortunately bitcoin is not yet approve and accepted by government so people still use for selling and buying bitcoin but with our own risk. if the government approved with bitcoin, i think bitcoin will be more bigger than before because bitcoin will reach million people than now and become a global currency like OP said.