Some numbers to get a grasp of the scale:

> There is 2.436.828 Ethereum in the account of the attacker (see: https://etherchain.org/account/0x304a554a310c7e546dfe434669c...)

> That's about 3% of all Ethereum mined (source: http://coinmarketcap.com/currencies/ethereum/)

> The Ethereum in the account of the attacker has a value of $41 million

> The volume is about 30% of all Ethereum trade today