Ebenezer Scrooge represents a couple of things at the end of the story, change and hope.
He represents change because he has so completely transformed throughout the course of the story. At the beginning he was a lonely, angry, greedy man who cared for no one. By the end of the story he is a family man who is happy and generous with his money and his affection.
"He became as good a friend, as good a master, and as good a man, as the good old city knew, or any other good old city, town, or borough, in the good old world. Some people laughed to see the alteration in him" (Stave Five).
He also represents hope because if Ebenezer Scrooge can change, maybe anyone can! At the beginning of the story we get the impression he is so stuck in his ways that nothing could possibly make him nicer or more generous. Dickens spends a lot of time in Stave One describing Scrooge as a terrible person and so his change is even more significant. As people we often look at our own habits and think we are incapable of changing them. We sort of give into the idea that we are a certain way, like stubborn, or penny-pinching. However, this story shows that even those of us who are very hardened in our ways can change for the better, and that gives all of us hope for ourselves and others.