This year, many Bitcoin whale wallets that have been dormant for over a decade woke up and sold their coins. Here are a few possible reasons: 1. Some original whales with extremely high conviction held on for so long and are now cashing out after achieving financial freedom. 2. Some were caught and sent to 'sew machines,' just got released, and were forced to hold for over a decade. 3. Some forgot their passwords or mnemonic phrases and just recovered them. 4. Wallet assets were transferred due to hackers or quantum computing cracking the mnemonic phrases.