China also from long time create their own cryptocurrency, however, this does not mean that it can threaten Bitcoin.
Price is still slowly increasing, which means that the popularity of Bitcoin as well. This means only his success, not troubles ..
I believe that the national threat cryptocurrency provide Bitcoin. Not for those who are already using Bitcoin, and for new users.
Not sure if i get your point, but as i understand, you think that national cryptocurrency can attract new users and because of that Bitcoin can have problems..?
In my opinion, when countries begin to popularize their own cryptocurrencies, it will only help Bitcoin. Because in this way they will confirm that cryptocurrencies are safe. This may be the first step Bitcoin into the mainstream.