The lack of control in circulating the digital currency is one of the reasons why other government is not in favor of cryptocurrency. And yet they also know the advantages of crypto that’s why it is hard for them to illegalize it.
In some countries like China and Russia they banned bitcoins and altcoins, however they are planning to have their own crypto which benefits their own state and yet be control, they are trying to innovate a centralized cryptocurrency. It’s like hitting two birds in one stone, they create a well-timed modern digital currency which they can flow into and manage, at the same time it has a huge advantage in their fiat currency and economic progression.