I don’t think bitcoin can handle such high load unless people use lightning network. Is it possible? Yes, but so far businesses aren’t showing LN any love.
So far, this looks like the best solution to make Bitcoin more acceptable as a payment method. But there's still one big issue, volatility. Some people might still be discouraged to use it because of that. Unlike USDT, which is a stablecoin, you don’t have to worry about price swings. That basically removes the risk. So yeah, with that in mind, I don’t really see Bitcoin being feasible for wider daily use.