It appears Greenland will join the USA either voluntarily or unfortunately by force (which would mean one nato country attacks another, and could end the nato alliance) as a territory or statehood. This will happen within 1 year from today and their zip code will start with 19000 USPS. 68% chance of accuracy.
Pros: Tourism, Ski resorts, massive infrastructure project (road, rail, highway), minerals, mining, rare earths, military. Greenland would have access to federal funds and a massive budget.