Russia is “very close”, by what means, exactly?Russia is very close and that gives them an advantage. They are a threat.
Their Black Sea Fleet has been badly degraded by Ukraine using little more than drones. That’s not a force capable of projecting power into the Arctic, let alone seizing and holding Greenland.
The U.S. already has a military presence there, plus the ability to project overwhelming combat power from the mainland. That’s before even factoring in NATO and the fact that any such move would immediately trigger treaty obligations from multiple nuclear-armed states.
In other words, it would make zero practical sense and would be functionally impossible.
There’s only one country currently threatening Greenland, and you’re living in it.