原推：@philmohun @elidourado @ATabarrok @tylercowen Two caveats:
1. If instead of buying Greenland, US wanted to buy some land in the middle of Denmark, *and* the US was a hostile power looking to put a mil base there, then security interests of all of Denmark should be considered
https://twitter.com/VitalikButerin/status/1526319046215356416