Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421cc476121b34b2ca245e84319c1f967c38fe8be9dcc155fd7d6fd078075ca763d11bd51ea0ad1626ae3c92614a39f37fa0c9d4115a44c97e50c8c15ecff3eb6