But I wouldn't use Bitcoin to pay for anything that fiat can pay with unless it's very necessary, if I were you. Bitcoin is a provably scarce resource, don't waste it. HODL.

Agree with you here on all accounts.
Just because you are physically able to pay with BTC doesnt necessarily mean its the wisest idea.
If you like bitcoin as a payment way and it has low fees compared to any fiat payment method, then why not? Why isn't it wise? You can just exchange fiat into btc and pay this way. Bitcoin is a payment method too, not just an investment option as you look guys.
Also it's not a good idea to hodl bitcoin, money has to be in circulation, I don't like the fact when others are just sitting and their only care is to wait while price rises.
How come it is not the wisest idea ?
You prefer to pay with cash but let me ask you something?
Does paying with cash gives you a rebate? Does it gives you a discount?
Well if we use our local wallet it does and it also does save some time and money, How? It is so easy we could pay without leaving our house with just our phone we don't need to fall in line to pay for our bills no need to grab a taxi or what .
And if we want to pay with cash or turn our crypto into cash it would cost some withdrawal fee ,So if we want to pay with our local wallet we save our own time,energy and money by avoiding withdrawal fee and having a rebate.