New data from Glassnode indicates that 30.2% of Bitcoin's supply is at risk from quantum computing threats, primarily due to key management practices. Of the 4.12 million BTC at risk, operational factors such as address reuse and partial spending are the main contributors, overshadowing the 1.92 million BTC exposed by Bitcoin's older script architecture. Glassnode emphasizes that the primary risk is not legacy code but how holders manage their keys, with operational exposure being more than double the structural exposure.