>>As long as "crypto" traffic is identifiable in any way, the state can ban it, encrypted or not.
No, with encryption, it's possible to make crypto traffic completely indistinguishable from all other encrypted traffic.
>>1. VPN traffic can be fingerprinted, which is one of the methods the GFW uses to block them.
The state would indeed need to block both VPNs and TOR to make a dent in crypto traffic. The former would have huge negative economic repercussions. The latter, while not directly impactful on any significant economic sectors, would face major challenges from civil liberties advocates.
>>A state can setup nodes in a cypto network and then go after anyone in their jurisdiction who connects to them.
Crypto nodes that transmit their data through VPNs or TOR cannot be detected like this. In any case, I think it's highly unlikely that the people in any country with a strong democratic tradition would put up with their government doing what you describe. The government is not the master of society. It is the representative of the collective will, and the collective will be very unlikely to support such nakedly authoritarian measures.