Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0464f21a2a764b05517511a39531699bbf7d25e5ee1715f3d9e381e19c5f255c6e92fed4e1a6957ebacd1f4ce91d5794c3890f3586c888fba7814db7f3452a996d