Those are not real crypto-currencies. Those are just digital versions of the fiat currency, similar to Paypal or Skrill. A crypto-currency should be decentralized. It can't be issued by any central bank.
i am agree with your statement. If crypto issued by central banks or government, i am believe its not different with fiat money but in digital form. They still control the supply and the price to maintain their money supply in market
The government or the central bank will not be able to officially issued other currencies other than fiat. especially cryptocurrency is decentralized. certainly outside the government system. other than that the rules in the government are also not allowed to make 2 currencies in 1 country