You might think that Greenland doesn’t have much value, but that’s because you are looking at a map the wrong way. You need to look at maps of the world from the North Pole. This will show three things:1. Greenland is positioned perfectly to intercept missiles flying toward the US from the Soviet Union.2. Greenland and Iceland is one of two options to transit in order to enter the Atlantic Ocean.3. As the polar ice caps melt, a Northwest Passage will be available for longer times during the year.So Greenland has significant strategic utility. That being said, since Greenland is a part of Denmark, and Denmark is part of NATO, an invasion is highly unlikely. However, there is modern precedent for one nation selling land to another such as the Egyptian transfer of Tiran and Sanafir Islands in the Gulf of Aqaba to Saudi Arabia in 2017.However, it is most likely that the US will just continue to expand its military presence on Greenland.