Because currently, many governments do not give permission to use cryptocurrency, that does not mean they will kill or completely eradicate crypto users. The government only issued a ban because of a reason. If it is in your country too, then keep using Crypto is fine, as long as you can use it for positive things that will have a good impact on you and your environment.
Probably, they kill cryptocurrencies because they never supported .The one they promote is bank which it tooks time to gain good profits. Unlikely on crypto no one who controlled in the market so if ever crypto will remain profitable then governments discriminate and have an issues.