Haven is for accepting many different cryptos https://gethaven.app/ which is built on the OpenBazaar network https://openbazaar.org/

I believe while in an optimal situation someone could have crypto based store only that makes no smart business sense unless you can afford to do that, cryptos should just be an option like what kind of credit cards you will accept. There are many physical retail business' which accept crypto right now, maybe one in your home town, look here https://coinmap.org or https://gocrypto.com/en/locations/ or https://coppay.io/merchants_map or https://bitcoinmap.cash/