If I were King of the World I would only hang out with other Kings of the World. However, anyone thinking they were the King of the World would obviously be crazy, and you wouldn't want your King of the World hanging out with a bunch a crazy people, so I guess I'd be kind of lonely.
Next I'd make Monday an official holiday for the world, remove Wednesday and replace it with another Friday, which I would also make a holiday called "King of the World Day" where I would be showered with gifts from adoring subjects. If you had to work weekends, holidays, Mondays or Fridays you get paid triple time.
Next, high speed net access for everyone with your portal being the King's website that loads a big picture of,....well, me. The price you have to pay for net access.
Hey if your gonna dream, dream big. My picture to the world.