Over stocking?

Patricia • My name is Tricia! I've been married for almost 6 years. I have 2 beautiful girls!
I feel that I am over stocking breast milk right now. I keep wondering if I'm gonna use it all. I pump enough to fill up all of my bottles in one day which is WAY more then she eats. I end up having to pump and store the rest. I have about 550+ ounces saved up. Can anyone tell me what the point is of having a big stock pile? I've been pumping since she was about a week and storing since she was about 2 weeks. So I started my pile about a month ago. Anyone have a pile like this?