Considering most people on this forum are crypto-supporters, I think we would all love everything to be digital currency instead of fiat, lol.. I do think crypto is going to keep gaining popularity and it's going to continuously grow when it comes to being accepted, but I'm not sure it'll ever be the only currency out there. Even now with fiat money, debit cards, credit cards, checks..etc. People are always going to want multiple options and that won't change. Still, crypto is going to become more and more of a "mainstream" option and might even become to preferred method over plastic (debit/credit cards).