Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421a43a7c02a2c4ad5cb446122634ccdf1cf5f80e4d8c0f2a737dfd3376f22c7e837fd1bbc9f2e91c1b8ad98adc15848c46ff126f5cae7e8c8a7a735642febdcb