Quantum exposed: this address has revealed its public key in a prior spend. A sufficiently powerful quantum computer could derive the private key.
pubkey 04216630e1f4c0c783bd4fb059fb32f6efadb9e7c456c391cd5b7128c0b6021576711592eb6c5176b0bc867110994d68ac7b4b122ecf02501d0d0c6ecad34f3ccf