The government, some of them are killing cryptocurrency by banning them or putting walls to their country.
but killing the crypto totally is impossible, all they can control is the ICO from their countries but after that, they can't do anything but to hold their citizen in having crypto.
this is the reality, crypto will have developed and will go rise even they don't like it.
I never even thought that they ban just because they wanted to kill the crypto, what they wanted to focus on was probably to limit the scope and impact of crypto on their country, they do not want crypto to penetrate deeply into the world of people when they do not control it. Governments are always the first people who want to benefit from crypto, they will not easily kill it but they will not show it, they will always show a face the opposite as other countries are doing, and exploit the benefit of crypto in secret