Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04201f831a7d6bb8693c3eb76002503d007cf20c581f50aa43546963f56fa3e8ab456ed4604380c5d4aded979d18a4828377f76b8cb8501b0d4896a61f4f978b28