The largest transaction sent 13,071 BTC worth $673.8 million in one go. This points to an over-the-counter transaction or an agency moving crypto for security purposes as the source of the movement. In total, 13 major transactions totaling 41,847 BTC were made by some of the world's most powerful Bitcoin holders. According to Whale Alert, about half of the transactions were between unidentified wallets. This week's market downturn has wreaked havoc on Bitcoin.