I was wondering about this. many people want to encourage crypto adoption in their country. but whether when adoption happens they will use it. or they are more comfortable using FIAT.
an example is a country has fully adopted crypto and they released their own stablecoin. they also legalize some other big crypto coins like bitcoin, ethereum, and some stablecoins like USDT or DAI. and you become one of the citizens of that country. which one will you use for daily transactions. stablecoins issued by your country's central bank, or mainstream crypto coins like bitcoin. or privately released stablecoins such as tether. or keep using cash because you are used to it. and give the reason why you chose that coin.
You need to understand the basics first, if a government legalized the decentralized cryptos then they will not implement another thing called their own cryptocurrency aka CBDC. Basically the central banks tokens are here to fight with the decentralized cryptos and just wanted to ensure there will be no freedom to use our own money.