You can never, ever, have too many fat quarters. There is always something to do with them. Mix them with solids you may have, you can create a marvelous holiday table runner utilizing colors that would go for that holiday (Halloween, Thanksgiving, Christmas, Chanukah, Valentines day, etc.).
If you feel there are too many taking up space in your home, I shall send you my address and they can take up residency along with all of mine, that seem to like being here. (LOL)