To fight against the control of USD thus create an anchor for people all around the global, or to make transactions apparent in cyber world, Bitcoin was coined by Satoshi(the second one is more valid).
Will the day come when everyone uses Bitcoin in daily payment(supposing new tech is applied to avoid high gas fee) and thus fiat gets abandoned? Or it won't because the amount of Bitcoin is set and all Bitcin is practically manipulated by capitalists...
Obviously , it's nearly impossible for Bitcoin to realize permant and global circulation due to its high price and scarcity, which renders it harder to take the place of fiat but it sounds that ETH is likely to be an anchor and a tool for daily use alike, surpassing BTC is feasible.
They say, if a country is at war or in upheaval, buying Bitcoin is not wise for its high volatility and USD is a better choice.
How do you think

If viewed from the total supply, maybe bitcoin is not enough to be used as a substitute for Fiat. If we share the total bitcoins with the entire world population, then each one only gets 0.002692 Bitcoin. That is, the amount is not enough to serve as currency in every person's wallet. But Ethereum has the ability in the context of mass adoption, because the Ethereum supply is also likely to increase, as has happened in previous years.
But what we should know is that Bitcoin can be used as a safe reserve of assets for everyone. Everyone who holds Bitcoin of course will not hesitate to lose even less than the amount they hold.