

There is a shipping route opening up that would enable Asian-Europen-American trade via a about 2/3 shorter route than currently possible. It would make any route through the Suez canals or around Africa pointless. This might not sound important right now, but it would fundamentally change the fortunes of countries and reshape the world.
https://www.thearcticinstitute.org/future-northern-sea-route-golden-waterway-niche/
I guess if the people of Greenland accept a measly 10k soon to be worthless USD in exchange to join a dying empire, they deserve to be part of that empire. Maybe Trump is actually smart and this is a hidden IQ test.