Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04b91c57ad58c02f1f4309e60e708f210ae3fac9b8b5a0651bb7db8418867d2975cd0364f1e9aba717318a278b108619af6a39d34dccc7b991b8797b394cfd0401