Technology takes time to mature and see widespread adoption. Whether you believe this will ever happen with cryptocurrency or not, you can't ignore that it's grown (by users, development, and many other metrics) faster than most other technological revolutions.

The internet took roughly 20-30 years to reach mass adoption. Cryptocurrency is about 10 years in, and while there are many active users, there user experience is still behind that of most payment options, and smart contracts which enable a host of other decentralized financial primitives are really only a few years old.