It's about how coins helped Elisa through one of--if not the--most painful and difficult periods of her life.  Finding pennies on the ground reminded her that good things do happen, would happen to her, and that she could keep going, keep putting one foot in front of the other, and find those good things.  I don't think someone who finally put the pieces back together after life made her fall apart wrote about one thing that helped her do it because she was afraid of missing a deadline. I'd say you don't know how painful hard times can be, and how important little things are to help you through them.