A legal means of payment is when someone is bartering with gold, if bitcoin is not suitable to be used as a legal means of payment, basically the price of bitcoin is unstable, try to imagine that the price of the payment instrument is unstable, is it suitable to be used as a means of payment?
When Bitcoin is accepted as legal tender, it doesn't mean every products and services price need to be equivalent in Bitcoin. The price is displayed in fiat price, whenever you want to pay using Bitcoin, the price will be converted in Bitcoin using payment processor.
I don't know why so many years now that there are still wanted to ask this same question , of Bitcoin becoming legal tender and will replace fiat because talking about this is like we will be losing Gold as well from bitcoin things that is very impossible to happen(redundant because that is what I feel now)
It's because of many newbies who is trying to replace anything with Bitcoin, probably they want to change their God to Bitcoin too.
Outside of El Salvador, I don't think any developed country will accept bitcoin as legal tender, it's almost unlikely.
El Salvador is still a developing country.