Its not like Trump's idea to buy Greenland from Denmark is wacko since apparently there is a precedent, The Virgin Islands!

How Much Would Buying Greenland Cost?

The United States bought what were known as the Danish West Indies from Denmark in 1917 for $25 million (about $657 million today) because of national defense concerns. Greenland is obviously much bigger, but in both cases the defensive value is based on location rather than size.

Consider the Virgin Islands instead. The United States bought what were known as the Danish West Indies from Denmark in 1917 for $25 million (about $657 million today) because of national defense concerns. Greenland is obviously much bigger, but in both cases the defensive value is based on location rather than size.