Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0423c5bc16a7b5db739c61e15cd0382b28861522a556edd55866ea6ed764b8f77dcbf3b78ea2a307bacc6a83a713f09a99fac98de68ffd5eff1e42fde6a64fb264