You can see this anyway you want but the fact will remain that no national currency can kill or cancel the original crypto currencies. Just take it as a confidence booster among masses for real crypto because when national will launch people will start trusting the original coins so millions of people that wanted to invest but were confused about legitimacy and genuinity of crypto coins will jump in when they will see the national coin i take this in this way and im hopeful of this positive outcome.
That's just the fact, crypto has gone so far that no national currency can "cancel it out" or make it go in extinction. It's true that the Chinese central bank coin might gain more acceptability and obviously usable when it starts circulating in China, but that doesn't pose a threat to Bitcoin and crypto at large in anyway. It's ironical to imagine that, some top government officials still hold Bitcoin even though they can't agree to this publicly.