Bitcoin public-key exposure hits 35.4% as quantum risk debate returns

Glassnode data shows 7.12 million BTC, or 35.4% of issued coins, now have publicly exposed keys, reviving debate over which holdings a future quantum computer could target. The figure is a structural risk metric rather than an immediate threat, since no practical quantum attack on Bitcoin exists today. Traders may watch this as a long-horizon security narrative that could affect confidence in older, exposed coins.