the goverments have plan to create their own cryptocurrenicies, so the btc and eth was just testing currencies to see how it works and get people to use with cryptocurrenies?
first whats wrong with fiat currency? the cash is works good nothing wrong with this.
second how they are going to control how much to issue the currency and how the value will be backed?
and by who the transparanscy is guranteed?
First of all, there is no way cbdc are going to be truly transparent and decentralized, so btc and eth and most of all cryptos are pretty safe in the future.
Not so sure about stablecoins and coins like XRP, but thats whole another story.
Will cbdc be backed by anything? Probably not, as fiat currencies largely are not backed already.