Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04215cafca83f017c6b4ec661d31bbdae81f690653d57e65eda31070175f302eb1fd9475e33cc622a80581517821c7a691c6fac08854803b51efb04eb4d8e4f621