Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 0421c05e81869422bc85925d7bae3f02db460b79bf59cb7212a19d7fe7fd98ed70457e181c7736124e986a823d9c19b95ac9b5a349e01a6b8b9e7152f35d474fcc