Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04211ad3cc53032d225842a444821fd686fdb732c86606bafc4b16e6c6dc99f22b8befef3c83b79649a960e89c71eaabe07f67466fbd101d335b957dc70285231e