Did you know that from any pubkey (nostr account) and block hash (bitcoin tx) you can generate all manner of things consistently. Here is a dungeons and dragons character created using this technique. Meaning that if you send a tx to the block chain it can create a unique character for you, deterministically, forever.
https://dungeon-mastr.github.io/test/generatecharacter.html?blockhash=0000000097df8db7ffc9a4432177eea77fa39e117f5091dc96b5372b812d283a&pubkey=bf5f99b906c8af89dfb0ea3491ec19a84357de063c9a8735a07342ea1caf2501