With nuclear weapons, that's already not going to happen.
That is not a threat that needs to be negotiated away. That is a threat that we need to use to fuel us to become stronger and to technologically defeat it, and then reverse the threat onto their doors. Negotiating it away means we didn't learn what we need to learn from beating it and that it can return anytime.
I've said this before; I do not want China to take Taiwan the moment we are sure we can. I think there is a real danger that after Taiwan is reunited, China will lose steam and vigor. To many, it will be mission accomplished and life can be spent relaxing and enjoying. Discipline can be lost, the critical discipline needed to churn out masses of STEM scientists who dedicate and even sacrifice their whole lives to pushing Chinese science forward. This will put us in a dangerous position of failing to overtake the West. I want us to retake Taiwan after we leave the West hopelessly behind so we can use that hatred, humiliation and anger as fuel to drive us forward relentlessly, so far ahead that our enemies have lost hope. By the time we reunite Taiwan, the West should so demoralized that they are no longer even putting in any valid efforts to challenge Chinese science so we can maintain our lead with cruising effort. Then we can take Taiwan, with basically no effort or struggle, and take it as a prize for crushing the West in the tech/econ wars.
It's not our bargaining chip. We have no leverage over it. America's not actually going to invade Greenland; it's going to make offers with economic threats. If Greenland/Denmark buckles, they buckle. There's very little we can do if they buckle. We can offer financial support but bleeding money into a place that isn't willing to defend their own territorial integrity is a losing battle.
That said, I do NOT think Greenland is going to the US, not even close.