Check out Plutus, they are creating a card that lets you spend your cryptocurrencies anywhere that accepts visa/Mastercard. When buying something, only the amount of crypto needed to make the purchase can be converted into spendable fiat which then goes to the merchant. This way you don't have to way for the slow process of merchant adoption and can instead utilize the existing payment infrastructures. They are also building a mobile tap & pay app to make purchases also.

They are currently live beta testing some of their products and they say a full launch will be in Q1 2019 but these things always take slightly longer than projects plan. To facilitate the purchases they need an exchange and that part is already fully functioning so its a pretty legit project. Smart team also.

Let me know if you got any questions, websites here https://plutus.it/ could be revolutionary imo