I love you guys, and I wish you were right, but I don't think you are.
Any of the above moves (military bases, Visa/MC, ASML, etc) would make the US suffer, but it would collapse the EU. Europe has a decade or two of hard work and crippling costs to significantly disengage from the US, and no one has the vision or fortitude to make that happen.
You also wouldn't have any security. If you disengage from the US militarily (whatever's left of "NATO"), we'll all see how far Russia can project power. Not as far as they'd like, but enough to make life miserable in a half-dozen or more current-NATO countries. Which puts pressure on their neighbors of course. This would be a shooting war in the east, which would require central and western European countries to decide whether they want to spend blood and treasure to respond. "No" kicks the can down the road a few years, "Yes" is economically devastating.
China could step in! It's a long way from China to the Mediterranean and North Atlantic, and their naval power is ... thin, currently. But you don't want China to step in. They could send money, but then they'd own you worse than the US even fever dreams about owning you.
The US seizing Greenland would be a terrible thing for the world, but I think the most likely outcome is that there would be complaints from the EU countries at highest level and volume, and a handful of countries would get legislation through to make the US suffer, but it would fail at the EU level, maybe even split the EU into two factions of American-bully-reluctantly-aligned countries vs American-bully-righteously-andor-selfservingly-opposed countries. The instability would last a few years, maybe a decade, and then we'd be back to where we are now, with "Greenland (US)" replacing "Greenland (DK)" on maps, but otherwise no one would spend much time thinking about it.
And the stomach-turning irony is that all of this is completely unnecessary. The US has a compact of free operation in Greenland already, including military operations. This is just an exercise in establishing dominance (i.e. The End of Politeness). There are some administrative details like mineral rights and redrawing international exclusivity zones (watch out Canada), but those are not very important when the global economic machine is working properly.
The rhetoric here in the US is that RU and CN are waiting to pounce on Greenland already, and that if we don't, they will. I honestly don't know if there's even a shred of truth to that -- it sounds like absolute manufactured BS to me (RU isn't strong enough to hold it, and CN can't project at that distance), but I have a strong anti-trusting bias against liars who lie, and those are the people dominating the conversation on this side.
The next ten months in the US will decide the next fifty years of the world. On a personal level, that's the rest of my life, and I'm worried about it.
I wish wisdom, resilience, and peace, for all of us.