i think thats not only for bitcoin, there are many things in smartphone that we can use for payment, like the apple pay, google pay, pay with QR, pay with NFC and many programs, so this era is not bitcoin era, but the digital currency era, what is mean? i think that all digital currency that have the instant access will be the change the payment system right now
Right. That's what comes to my mind, too, but not only that. I also think of
WeChat payments that are incresasingly popular in China: they don't need cash anymore.
At least that's what I heard.