Going home with it in your pocket doesn't do squat for you. Yeah you want it to "guarantee" you final 4 (which is why all of them haven't played it - they want that future guarantee.) Just play the darn thing and figure out how to advance in the next round! You know they're going to hide a new one if you do play it - so go find it again or make a new alliance or whatever it takes to survive the next vote.