Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421390f609aef383b5da94af5bb7859c0c96e5aaba7a237a575b3cad3f6284b01d97f7903fa2c07aae4ab804589b29131be746cf63dbf814eb700479657fd3710