Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04c521b4b8b3874586520cb1161d169c4338b93cdf668e1ecc924789ee811ebea7f98b67b01d02cfb5e6141a3e958005fcc3986e5f8dcb4c81b5b180f995dfa547