"there's still a chance it could become legal tender again in the future"
Personally, I won't ever use my coin for day to day stuff until I'm getting paid in coin.
Who do use bitcoin daily?
There are places where lightning network is well integrated, and people use it on a daily basis for making transactions. Why wouldn't they?
t's not good to use your long term investment asset daily. You will lose your precious bitcoin by using it daily and also you will lose more satoshi to on chain transaction fee.
You are not losing anything, you are using it. There is a big difference. You can buy it back right away, this point does not make sense.