Trumps Threats against Greenland, do they matter?

I have heard a range of reactions from he is just getting attention, to maybe he can make a deal.

This is more directed at people who think it is mainly for attention and dont see a downside. I am curious if you have considered what talk of force, and how Greenland “needs security” does to US/EU relations, or NATO? Seems very apparent that this talk hurts those ties. That is what Russia and China want. Is this talk worth it to you? Does anybody think this is responsible or good leadership?

https://www.cbs19news.com/france-germany-warn-trump-against-threatening-sovereign-borders-on-greenland/article_28e68296-1593-5c36-829e-eb04d01a6fae.html

https://newrepublic.com/post/189950/trump-son-greenland

https://www.cbs19news.com/france-germany-warn-trump-against-threatening-sovereign-borders-on-greenland/article_28e68296-1593-5c36-829e-eb04d01a6fae.html