Buy North Korea and free all the people, make it into a country sized paradise for myself and my North Korean buddies, make Kim Jong Un my personal assistant/slave.
Also I'd buy that Ferris Wheel in Chernobyl and move right into the middle of New York, because I should not be trusted with money.
Free beer all across Canada, fuck I'll buy Canada too I don't care, I'd stop any commercial logging and oil production and pull a Hugo Chavez and nationalize Canadian forestry, oil, and water so that the proud people of Canada could be well prepared for the future and shit.