Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04210f99d9556bdb158a9df15c15a2de5d84ed3067fd6251f44d0a01c25789f3816fa5056be7021322d1562285961f61063e6e68b7b4bc63b78a53472e4bd5c7b7