With a few exceptions I would have preferred to keep all my games but only have room for 7-8. I’ve had a couple for 4-5 years and have no intent of ever selling but typically change out after 6-24 months to keep it fresh and improve my skills. If you take good care of your games, including adding Cliffys, they will hold up great in a home environment.
I’d just enjoy the obsession and switch up games when you feel the excitement tapering off. My wife was concerned at first with all the money but is supportive now that she has seen how easily they sell. Just be patient, and smart about condition and not over paying.