Cryptocurrency is the future of all payment method due to the decentralized nature which grants financial freedom and power to the people. However, for it to replace cash or the Fiat, it will take years of awareness creation. Up to date, some people do not have access to internet whereas others do not know how to access it.
it supposed to be a project that aims to change the future ona fundamental way. so no doubt it will take years. i am sure we are young enough to wait for it though 
the changes will follow soon