New analysis reveals that over 30 percent of Bitcoin's supply sits in wallets vulnerable to future quantum attacks, with exchanges holding a disproportionate share of the exposure. A startup has proposed a soft-fork solution to protect even dormant holdings, including Satoshi Nakamoto's estimated 1.1 million coins.
Blockchain analytics firm Glassnode reported that 6.04 million bitcoin, or 30.2 percent of the circulating supply, reside in addresses where public keys have already been exposed on the blockchain. The firm identified exchanges as the primary concentration point, noting that roughly half of all bitcoin held by labeled trading platforms falls into this category compared with less than 30 percent of non-exchange supply.
