PANews reported on May 22 that, according to Decrypt, research published by Glassnode shows that nearly one-third of circulating Bitcoin has exposed public keys, theoretically making it vulnerable to future quantum computer attacks. Specifically, approximately 6.04 million Bitcoins, worth over $469 billion, are at quantum risk. Of these, about 1.92 million are structurally exposed, stemming from early "pay to public key" addresses, multi-signature structures, and Taproot outputs—script formats that default to exposing public keys. About 4.12 million are operationally exposed, due to address reuse. Of the operationally exposed Bitcoins, approximately 1.66 million are exchange-related, accounting for 8.3% of the total supply and about 40% of all operationally exposed Bitcoins. Looking at the holdings of major exchanges, Coinbase has only 5% of its Bitcoin exposed to quantum risk, while Binance and Bitfinex have exposure rates as high as 85% and 100%, respectively. Glassnode stated that this result should not be interpreted as a risk ranking or solvency signal for any particular company.