still one thing I don't understand: if for fiat it's the central bank governor for a country that decides the local daily currency price against the other fiat currencies, who decides the price for crypto? Bitcoin Core software? Exchange platform software's AI?
Central bank governor is not really deciding value for respective fiat currency, but it is combination of several factors like supply and demand, government stability, war against other countries, etc.
In obvious cases with hyperinflation that we saw many times in history, supply becomes much higher (total supply is infinite btw) and there is no single person or institution that can control value of that currency.
There is always market manipulations for everything and that can obviously be controlled by coalition of government, banks and big tech.
Bitcoin has limited supply of 21 million coins, demand for coins is growing and there is no CEO to twist his arm and blackmail him to control Bitcoin.
Bitcoin Core is just a software that has no relation with fiat value of Bitcoin, but exchanges can manipulate Bitcoin price with printing of more Tether coins.
If enough people value what Bitcoin has to offer, that is money separated from state, than it will have higher value or maybe it's just fiat money losing it's value.