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So unless someone from China started some 'coup' to overthrow the communist government, they will held on their power for at long as they want to.
This coup can be a bloody one, and therefore I am against such a scenario of change of power. I hope the Chinese leaders have enough wisdom to do something similar to what Mikhail Gorbachev did in the end of 1980s. Communism failed. They have admit it and move on, if they wish good to their people.
~ The only thing that has ever crossed my mind in the case of linking bitcoin to war is that people could easily use it to move money out of the country easily without it being traced, and this practice will only benefit those top people who are even the ones that caused the war, and like you said, they will eventually dump the coin back when they have the chance to do so.
Bitcoin is traceable, so the bad guys, you've mentioned, would probably use other than BTC crypto for their bad deeds.
Overall, I think we shouldn't wait for some wars and/or catastrophes to happen so that could boost the price of Bitcoin. That's immoral.