So to follow through with the idea described below, here is my "backup" public key:
nostr:npub1n2sajpzdpyfa87wlw7rscfkcalel0fyhe574skeewwm0lr0dvxmqtndpgq
Just to be clear, I'm not currently using this public key. I'm just handing it out so that, in case my current private key is compromised, I can use the above public key to let people know that they should no longer trust messages signed with the compromised private key.