Most places which accept Bitcoin don't plan on holding it as cryptocurrency; it's converted quickly to USD (or whatever). They would do the same with ETH or US

Most places which accept Bitcoin don't plan on holding it as cryptocurrency; it's converted quickly to USD (or whatever). They would do the same with ETH or USDC, convert directly to USD, or Bitcoin then USD. In short most USDC purchases would probably be fiat -> ETH -> USDC -> ETH -> fiat anyway. But fiat -> BTC -> fiat is a more established channel, and with lower txn fees at the moment.