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.
If a country create its stable coin it will be something like digital state currency. Personally I don't believe in any digital state currencies. They will still be under the control of the government. The main feature of digital money is decentralisation and uncontrollability from authorities, but digital euros, rubles, yuan will be under regulation, so it is the same as just non-cash money but on blockchain instead of your bank account.