"Converting crypto to cash isn't paying via crypto" I agree, and didn't mean it. What I meant was that there are some online stores & even payment gateways (which also accept crypto apart from card or netbanking). I haven't tried or checked which commodities can be bought or sold with crypto. There isn't too many stores that accept crypto as payment, but they do exist. Also, there are crypto atms in airports & other places, where you can obtain cash in exchange for crypto.
Crypto holds value atm, though it is volatile, thanks to people buying & selling without knowing what they're doing, and because of laws discouraging crypto transactions.