A possible new feature enhancement to Nostr might be the ability to 'pin' one note to the top of your profile feed. Just one, that you can unpin and change later. #asknostr #features #suggestions
Discussion
Nostrudel has this
I imagine this could be done as part of your kind 0 note, where you can reference the note ID of any note you like. The trouble with that is any client that doesn't support it, but does support editing your profile, could erase your selection of what you wanted pinned if you update your profile info from that client.