While Mrs. Lang probably will not get to enjoy her lunar property in
person, perhaps she could will it to her children or others for the
day when people and companies will own property on the Moon -
despite the 1967 United Nations Outer Space Treaty forbidding
anyone from owning pieces of the Universe.

http://history.nasa.gov/1967treaty.html

We may actually look back and think how smart she was when her
property is bought out by United Helium-3 Extractors Incorporated
for billions.

After all, they laughed at a guy named Seward for spending just a
few million dollars purchasing a bunch of ice and snow called Alaska
from Russia in 1867.

Seward's Folly