According to CoinMeta, a hacker using the account drift went short on the ETH / BTC exchange rates and achieved a floating profit of $658,000 yesterday. The ETH / BTC exchange rates fell by 3.56%, and this hacker's account (0x45d…) opened a 20-times ETH short position and a 20-times BTC long position worth $20 million yesterday morning. At 6 a.m. today, both BTC and ETH declined, but subsequently, BTC rebounded more strongly than ETH, resulting in an increase in the floating profit of that position.