What do you think about this?
In this regard, Bitcoin is the good one while fiat is the bad one, and due to some reasons, the bad money might drive out the good money (Bitcoin). I also get the point that the good money (Bitcoin) can oust the bad money which makes it to be like a competition between the government and freedom in relation to centralized and decentralized money holding and usage.
Therefore, according to the aforementioned Bendukidze supplement, cryptocurrencies will oust fiat currencies from circulation, which are completely controlled by the state.
I want to be more specific on Bitcoin, it was not created to oust fiat, it was create to give freedom and privacy which is just an alternative to centralized money. If the true design of Bitcoin can make fiat go to an extinction, the government can regulate it, most people nowadays do not even care about privacy while they prefer the use of custodial means to use Bitcoin and other cryptocurrencies (although, I am not recommending that).
Bitcoin does not totally fall into this category as a money that will disappeared, but it fall into the category of good money. Some countries especially the Western countries see the good reason to allow citizens to use this Bitcoin and other cryptocurrencies, while the governments are trying to regulate it. Bitcoin is not even showing any sign of extinction because the governments of the world are thinking differently. Fiat will remain fiat which is inflationary while Bitcoin will remain deflationary and an alternative to fiat and a store of value.
I even see fiat as good and the reason people embrace Bitcoin and other cryptocurrencies, without the fiat, why will people be buying bitcoin, if nothing that fiat is inferior in value to Bitcoin, people will not embrace bitcoin, it is because the fiat is a deflationary currency is the reason people see the value in Bitcoin as a safe haven. We are just in the world fiat will coexist with Bitcoin and other decentralized currencies.