{"id":"tp-36174","type":"article-newspaper","title":"Bitcoin's 1.7 Million BTC in Legacy Outputs Face Future Quantum Risk","author":"Simon Yoon","publisher":"TOKENPOST Inc.","url":"https://www.tokenpost.com/news/technology/36174","datePublished":"2026-10-21T00:49:44.000Z","dateModified":"2026-10-21T00:49:44.000Z","language":"en","abstract":"A June 2026 estimate placed the coins across roughly 20,000 visible public keys. A broader March 1 snapshot measured a different group of exposed BTC.","section":"Technology","references":[{"title":"broader March 1 snapshot counted 6.9 million BTC with public keys revealed on-chain","url":"https://www.tokenpost.com/news/technology/27549"},{"title":"wallet controls for exposed Bitcoin addresses","url":"https://www.tokenpost.com/news/technology/28073"}]}