According to Coinbase's product chief, Conor Grogan, there is a small chance that the $8.6 billion in #Bitcoin that moved on Thursday from eight wallets that had held BTC for over 14 years was due to hacking, and if so, it could be the largest theft in history. The blockchain intelligence firm Arkham stated that it was a single entity that moved $8.6 billion in Bitcoin value from eight separate wallets.