A: You have been this forum for 2 years, are you really don't know what is stablecoin like USDT, DAI, USDC? It's a coin that pegged with fiat, so it doesn't make sense if CBDC replace stable coin since both of them have stable price.

B: Government can ban the whole coins if they don't like it, any centralized coins will be gone since they don't have any way to trade. While Bitcoin due to decentralized, you can trade via P2P or with decentralized exchange.

C: That's a person who doesn't have any cryptos since he don't care with the price.