you can play with words all you like but that will never change any facts about bitcoin.
bitcoin matches the definition of a currency, a medium of exchange and a payment system perfectly well
https://en.wikipedia.org/wiki/Currency and it has been designed to do that in a decentralized manner and has been doing exactly that in the past 10 years.
I agree with what you say in my opinion that bitcoin is a digital currency but cannot be used like a fiat currency, there may be a number of reasons that there is a legal issue that makes bitcoin difficult to become the applicable currency of course
Do you know what you are saying?Zthere are some countries that treat bitcoin as fiat,just like in japan when the government adapted this number one cryptocurrency and let it function like what the fiat or Yen so this is a clear statement that bitcoin can be used as fiat the only difference is the physical and the digital but other than that they are same functions