OP is not the payment option that can increase sales in a physical store because even if some people will buy items in large quantity using huge amount of cryptos, there are also those that will buy some low budget items with little amount of cryptos so it's not as if it will be different from how people spend Fiats, the difference is just that using cryptos to buy items is a kind of making the transaction private and without your real identity unlike when you make transactions with Fiats and your name appears on the recipients transaction history.