Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421fe9b75774c29a8cc77eb39965a9c39f7823fbc5466b7be0f6cf3c4da7105cb1c9c4d79e8e0089e104884bbbac443b2e8ede3d8ba9498b6c9cbea1d6082bc6b