I’m not a frequent user myself so I’m probably not the best to answer on the usability front, but for the combination of high TPS and low price volatility I’d probably recommend using one of Ethereum’s stabletokens (DAI, USDT, etc.) on one of its layer-2 networks (such as Arbitrum or Optimism). Stabletokens are cryptocurrencies whose value has been tied to some external measure, in most cases the US Dollar, so they’re ideal for use in commerce.