Actually they might help. We'll see how they are implemented.
What I am thinking is that they are supposed to be stable coins. Probably the most trusted stable coins.
If they manage to replace Tether and other shady ( = not properly audited ) stable coins it would be good for the crypto markets: there may be less cries about price manipulation.
Then what is the point of using cryptocurrency if we have a legal digital currency? are not almost all of the existing cryptocurrency means to be a payment system?
If we are looking at the usage of this digital currency, it is completely obvious it will hinder cryptocurrency and it might replace cryptocurrency because of regulation.
Anonymity might be needed but it is not necessary, what we need to have is a global and regulated payment system. Freedom is a bonus if we can get it.
We need to see the fact and reality, I highly doubt people will use crypto if we have it in the future.