You all know he's insane, but you'd rather worship the Antichrist than deal with reality. You don't actually have an argument, so all you can do is say I'm the one who's crazy. LOL It's laughably transparent, and it won't work, but thanks for playing.
Last territorial purchase 103 years ago. That doesn't mean it's a good idea or in Denmark's best interest. Greenland is rich in coal and uranium and will be more valuable than ever if the ice melts.
Also, one of Putin's chief ambitions is sole, undisputed control of the Arctic. Greenland is invaluable to that end. The Danes know this, so why would they ever sell it? I doubt the Danes living there would be enthusiastic about being treated like Puerto Rico.