Or did society adopt fiat because it was actually dictated by the authorities, which then slowly became the first monetary policy in modern civilization that every country must have a financial institution to make distinct fiat and must be used by its citizens as an economic benchmark?
Yes, you are right, fiat adoption is promoted by the government but fiat adoption doesn't happen overnight, it takes a long process until finally people are ready and believe in fiat. Now many observers are predicting that sooner or later the USD dollar will collapse and that could be the collapse of the fiat financial system. When the dollar collapses, you want to replace it with any currency, the result is the same, only paper
If people no longer believe in fiat which is only made of cheap goods (paper) then a new currency is needed that can truly maintain its value. I'm sure everyone would agree with gold being reused as currency, but how effective is it? it is no longer possible to use gold as a means of payment when viewed from its effectiveness, it is impossible for us to carry 1 pound of gold in our pockets to shop at the mall, it is impossible for gold to be used for digital transfers and payments while the world is now moving into the digitalization era. So what's the solution? the currency that supports the digital era and is believed to be able to maintain its value is bitcoin, nothing else.
But on the other hand, I also believe that it is impossible for the world to make bitcoin the world's main currency, the reason being that bitcoin is decentralized so that the government cannot control bitcoin. So I think the adoption of bitcoin can only be as an alternative currency, but it doesn't matter if bitcoin is legally recognized and used around the world. That's pretty good for bitcoin