My opinion is that starters still prefer paying in fiat as they still learning about Bitcoin and how to safely transact with, leaving both options fiat and BTC payments is an option. On the other end, the more we see a circular economy popping up the better and payments with Bitcoin will become more standard.
Pushing small shop owners, businesses to accept Bitcoin payments is needed, hopefully we see this happening more in 2026 all over the EU, which are way behind the US on businesses accepting bitcoin payments 😉