Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421e87185a1c48cb64b5e097ea5a49d0c714792cc73e5479efe8bbaad5973a93c82b081b3d4715acc02461e0f9291dda12fa490e9a60956695782c42705a9ceb4