Greenland provides many benefits to the US

[muriel_volestrangler]

12. Not really; the coasts of Greenland don't lead anywhere interesting

https://www.britannica.com/place/North-Pole (look at the 2nd image, which is a map centred on the North Pole)

The real pinch point is the Bering Strait, which the USA already has half of. If the entire Arctic Ocean were to become ice-free, you could go from there to the North Sea going close to the east Greenland coast; but it's hardly any further to remain further off the Greenland coast, and closer to Svalbard. If your destination is the North American east coast, then you will go through the Davis Strait, but this is about 200 miles wide at its narrowest, so there's plenty of non-Greenland water to use. And if you're being belligerent, then the Bering Strait would be the place to launch attacks from.

This whole thing is probably a massive troll by now; it may have originally be born in the dim recesses of Trump's memories of US history and "purchases", with him dreaming of getting credit for another one, not understanding that geopolitics has changed in the last 150 years. There's modern war uses in terms of airbases, but any normal US president knows that if they shut up and treat Greenland and Denmark like friendly independent states, they'll keep the use of those.