I'd auction and sell it and be done with the headache personally. It's likely one day your meta well will dry up and that will be it, years of back and forth to see the handle gone and promoting crypto eventually or some crap.
Many companies forbid the sale of usernames in their terms of service, so an attempt to auction it off could result in it being revoked. Generally, when sales of usernames do happen, it’s in private so there’s little reason to take action… it’s why there’s no reputable marketplace for usernames.