Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04211604f680bbd08e82f0cc88c4d527c684ed6c342a2a0bbca4cc026910089172d9d4f36fbdec431ae389684223b923e8e3b07fc9351097175254cb0b2ea48b40