They already tried it before but they didn't succeed on killing it.
Some country even ban it but they couldn't totally stop the people from using crypto or earning from it.
They could only create FUD by banning it but it wouldn't kill it.
That's correct.
In fact, all the previous attempts to create "Bitcoin" before Bitcoin were somehow stopped by a government.
The main different in the case of Bitcoin is that it is truly decentralized, so there's no "head" to stop. There's no one to stop so that Bitcoin stops.
Bitcoin will continue forever, as it's a protocol, not a "company".