The DAO quickly became very successful, raking in $150 million from 11,000 investors in 28 days.[482] But the smart contracts behind The DAO were filled with bugs and security holes, and in June 2016, an unknown hacker exploited an unknown bug[483] to steal 3.6 million ether, then worth about $50 million, from The DAO’s coffers.[484] This was a massive amount of money: about 14% of all ether coins that had been mined up to that point.[485]
