Some people can pay for groceries with crypto, for example in Slovenia there is a supermarket chain that accepts Bitcoin Cash (BCH) [0]. map.bitcoin.com [1] displays local businesses that accept crypto.
Then there is acceptbitcoin.cash [2] which lists online stores and services that accept Bitcoin Cash, Bitcoin and/or other cryptocurrencies.
That is one of the main things I like about Bitcoin Cash: it focuses on user adoption as money and not as a store or value or speculation investment. Avoiding the exchange to fiat money is essential for P2P electronic cash like Bitcoin was meant to be.
I don't know if adoption will increase, nor do I have a strong opinion on whether it should. But it does solve the specific, narrow problem of lack of basic banking for the poor.