curse you pants...

so most girls have that dream pair of pants that is too small for them, yet they keep it in their closet in hopes that one day they will once again fit. i wish that was my problem. instead, all of my pants are too big! all i want is to not have a saggy bum in all of my old pants please! so this is the question, do i keep these pants in case i gain my weight back, or just bag 'em?