Lawd...if people really believed the world was coming to an end, I say go buy yourself a brand-new Mercedes Benz or Bentley and enjoy it while it lasts!
But wake up Dec 22 thinking "oh fuck, how will I pay for this??"
If the world does end on Dec 21, I hope people get it on video and upload it to YouTube on Dec 22. That way we can have even better visual effects than the movie did.