Is it bad that when I think of old people, I just want to cry?

It just makes me so sad thinking about them. I just can't help it. Especially the ones that were born in the 30's, 20's, & so on. I'm just grateful that they're still alive today. I'm very happy that they are still living. But I just feel bad because they don't very much time left to live. This goes to all the old people including actors/actresses. I'm just a sensitive person. I guess its because none of my grandparents are still living. =/ Today, I was watching Kung Fu Panda 2 in theaters, & when I found out the guy who played the goose was in his 80's. It just hit me. I started shedding tears. What's wrong with me? =(