Thank you, for posting such an important question.
I think that if a government issues its own coin, it will not affect btc. What attracts people to btc and other cryptocurrencies is not that they are digital. We already have digital money with PayPal and credit cards. In best case, it would be something like TUSD.
What makes btc attractive is that it is decentralized, borderless, and wild. We are sick of central banks and governments dictating what we can or can not do with our own money. We are sick of all those middlemen. We want to be in control.
RE: Cryptocurrency Question Wednesday: