Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 041521d609ed990e1aa389411b57f23e29b98158c327997b04c0738cbd7c9c8fe5236d84c670b373032f11288bb90513ddd93a513fcb3f5ea0abaa6fee8da2e433