Greenland glaciers:
I think definitions of "habitable" can be a little loose -- consider that Alaska is said to be only 20% habitable.
But the other 80% is not covered with glaciers, it's just too wild and rugged for human comfort.
So, Greenland at 836,000 square miles is about 25% bigger than Alaska, though Greenland's habitable area, as best I can tell, is only about 5% the total -- roughly the size of Pennsylvania.
Another 121,000 square miles -- the size of New Mexico -- is not covered in glaciers but is also not inhabited.
Some of this area may well contain extractable natural resources.
So, possibly 167,000 square miles of Greenland not covered by glaciers is worth how much?
Well, in the region of Alaska's North Coast, some land can be purchased privately, for prices that amount to roughly $120,000 per square mile (~$200/acre).
Apply that same price to Greenland's equivalent 167,000 square miles gives circa $20 billion -- if my decimal points are in the right places!
Extending the same pricing to all 836,000 square miles would make the total circa $100 billion, again, if I got my decimal points right.
Alaska and Greenland combined are roughly 1/3 the size of Siberia.
Alaska, Greenland and Canada combined are roughly the size of Siberia.
What is the value of Greenland's natural resources?
No way to tell, but the Alaska's North Slope has oil & gas of at least $1 trillion's worth.
So, it could be anything.
Greenland in the summer: