Let's return to the discussion of money and the OP's question about why Bitcoin is not money. For me, Bitcoin is money that can be used as a medium of exchange to buy goods for those who use it.
I'm sure almost everyone knows that Bitcoin is money or a transaction tool in the form of a new digital currency or you could say electronic money, and this digital currency is famous throughout the world.
And if a country legalizes it, Bitcoin will definitely become legal money like money that can be used as a medium of exchange like money in that country or as an alternative to money. And even though countries do not allow Bitcoin to be used as money, they can still carry out transactions using Bitcoin individually or secretly. And most people cannot use Bitcoin as a transaction tool like money, due to regulations and laws in each country.