The RE…DONT SELL IT …yet. Keep it, keep it, keep it keep it.
Cancel the insurance, SORN it, wash it dry it and spray & rub it all over it in some cheap oily stuff and push it into the far corner of your garage/shed/ garden or wherever put a cover over it and forget about it.
one warm day next year or the year after or whenever, the urge / interest to get back on the bike will kick in. Try it then and see if you regret keeping it. If the urge never returns after 5-7 years then yes sell it. But not until you are 100% sure you really really don’t want to ride again.