With climate change opening up more routes through the arctic seas, it becomes a strategic place to set up shop and control all that traffic (read: tax.)
Incidentally we already have a base there. (I believe it’s for launching rockets into polar orbits. Don’t quote me on that.)
It's an incredibly lucrative land for minerals and such, they already had to give Denmark a slap on the wrist for screwing over the local Greenlandic population.