Probably, no state would do that directly, but what some state could do is too notice unstoppable spread of BTC in their territory for some reason (e.g. because

Probably, no state would do that directly, but what some state could do is too notice unstoppable spread of BTC in their territory for some reason (e.g. because of their own fiscal policies like in Argentina) and instead of waiting to become irrelevant, fight, lose all karma and all funding, could develop a guideline to save the face and satisfy greedy interests of the officials. They can do a "special economic zone" or simply develop simple regulation and taxation terms. If they aren't going to stop that thing, they can profit off it over some extended period of time instead of fighting and quickly losing everything. Of course, it all depends on actual power structures and level of psychopathy. Good thing, Bitcoin does not care. If there's a fight against it, it'll only slow things down, not stop the process completely.