..will one day be used to compete with banking electronic money.
That is the first wrong statement. "Electronic money" is a vague term here. We have both fiat and crypto in this section. Both have their own uses and cater to a specific niche group when talking about crypto. Hence these two never will compete because the target population is different. Overlapping population is there but their needs for using fiat and for using crypto are different.
A person might need fiat to buy daily groceries but do investments in crypto, are they mutually exclusive? Nope.
Maybe if there is competition between cryptocurrencies and banking electronic money, of course, the government will take policies such as blocking or trespassing, so for example it is an anticipatory step, what steps should we take?
Governments are currently watching how this sector moves and changes shapes. Dont think that they dont know if you have already been laundering money - otherwise crypto related scammers and rings would not have been caught.
Stopping the use of crypto means shutting down internet access or electricity. Now use your common sense, which democratic country would do such a thing and be able to live with such a thing?