Somebody is eventually going to end up owning Greenland, it could be the USA, Russia, or the Chinese. Those minerals are handy to have for 'obvious' reasons
Why don't we throw a couple of Nukes at it and spoil all their plans
*am I serious? no not really, but do you think any 2 of the above will be happy for the 3rd to take it all without putting in some resistance by fair means or foul?