Can I register more than one handle?
Yes.
Bluesky limits each user to one primary handle at a time but Handles Club has no limit on the amount of handles a Bluesky user can register. Once a Handles Club handle is registered, it belongs to the registrant forever and the registrant can add it to (and remove it from) their Bluesky profile as often as they like.
Interested in the technical details? Learn more in How does Handles Club work?