Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421bc0f2645ba00bdecc34ec2703587fc95e6bd8c90cf5daee9933933c26770be00e91017ebb50e1097da8b071e311a968f97239b3261f1559509c5708c91fc52