yes cryptocurrency is currently a thing it is actually onetrending piece of currency aroundbut it's not that easy it's not like you just go to Walmart and buy groceries a Bitcoinactually it's pretty weird saying it's backed by nothing and can crash at any moment
It's most defiantly a thing and constantly growing. Most likely soon you'll be able to purchase groceries with it. KFC just ran a deal where you could pay with bitcoin.