It seems like it's not such a far out idea. There are many ways to use cryptocurrencies to buy basic needs. I just did a quick search and found many options. There are sites that will let you buy gift cards with crypto. I found one that sells Walmart gift cards. I'm sure you could buy all your basic needs at Walmart. In terms of buying things directly with crypto. I think it is becoming more and more feasible. You basically just need somebody that's willing to accept it. I found an app that lets you order groceries with bitcoins. It will just get more and more possible as time goes on.