April 26, 2011 - Satoshi sent a final email to Gavin Andresen, asking him to downplay the notion of him as "a mysterious behind-the-scenes figure." This letter was followed by a separate message, containing only a copy of the cryptographic key from the bitcoin alert system.
The mysterious Satoshi Nakamoto disappeared from the radar on April 26, 2011, taking with him 1,148,800 BTC, which is 5% of all coins 💰