Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421f18e689320edf5b40add73c6e3cfdf086bc919047b429c34d978381da6288dd176fe1732371ad573874df0f1ccd3d98bb37cfa1eae5e3cd1026be9faf38b59