If you seriously believe that Trump would invade Greenland and oust the current government, then you must be the same type of people who mistake his negotiation style as being a TACO. Of course he is NOT going to invade Greenland! The risk vs. reward makes zero sense to do that. That would mean the US exits NATO and become the enemy of the world! He is simply giving the other side a way to save face when he gets what he actually wants. The US already has full strategic use of Greenland. What Trump wants is to avoid what happened with the Panama Canal after the US gave up control. He wants the US (and US companies) to invest in Greenland. He wants to make sure that the US will control the results of those investments and to reap its benefits forever, He is saying all those things to get a treaty that would make those guarantees. If he doesn't get it, he just won't invest in Greenland and the comments will be used as a pretext to prevent adversaries from going anywhere near it.