Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421d34c48553578afbb92365bb08111d6671cc69aa8a66695d3a325c37b867a44f7347067a08973e5abba4b7f3b6cb523b9977c0863d7a9e9f04f1e3f499c5541