That’s not how you convince merchants to start accepting #Bitcoin - don’t worry about volatility, nobody will pay you in #Bitcoin anyway.
Numbers differ from event to event - during Baltic Honeybadger conference in Riga few months ago total turnover for street food merchants was above 1 BTC in a few days (see BTCPay Server report), they weren’t bitcoiners, they wanted fixing price in fiat, so there were configured automatic swaps to USDT on Liquid.