Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421d07e23611957170864931f9f5141b829e3b7a83f7a84e5f7e21b9e4bb01158f987f0b922d9a87f0c14e40882d04a4e0712190a8ad9e6c7e6c5fbe3ee365221