The Mystery of Bitcoin’s Sleeping Whales, and What Happens When They Finally Wake Up

Bitcoin has a peculiar problem that traditional financial markets rarely face at this scale: nobody knows exactly how much of the asset is still controlled by people who have effectively disappeared. As of September 2026, Glassnode data shows 3.6 million BTC had not moved for more than 10 years. That represents about 17.8% of Bitcoin’s existing supply. Another 1.7 million BTC had last moved 7 to 10 years ago. Some of those coins belong to determined long-term holders, some to people who lost their keys, and some may belong to estates, early miners, hacked entities, or owners who simply have…