Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421a294fb851876cf5d37ace02e1315e4d3fd15b5727ad79d22679cc268b07688fe62ef2ed857d29b020d05dccb8e93b6bb116866f97a8eeb9284c4f0b9f2a735