Folding very good hands pre-flop

[GoSox]

Am I the only one who does this:

With 3 or 4 players left, if I am chip leader or close, if two others go head to head either all in or big raises, I will often fold hands like AQs, QQ, KQs.

Short handed they could have almost anything, and there is a good chance I have the best hand. But, I figure it's in my best interest to stay out and assume one will be completely eliminated then enter and risk myself. No risk for a good reward, instead of medium risk for a great reward.

Is this too tight ??