Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421918aaff5ae97e9b226edbd57ea4f09acb7ca62c9789de8de7c980e4464c0ba74447dc1f4602682c223a70d29121ebbd90df0d560c817b3041898bf52df1e3e