According to Ember Monitoring, a certain whale sold 3,158 ETH for 7,510,000 DAI at a price of $2,378 USD four days ago, and then used the 7,510,000 DAI to buy back 3,053 ETH at a price of $2,460 USD three hours ago today. With this buy and sell operation, the address lost 105 ETH (worth approximately $260,000 USD). The ETH in this address came from BTC converted at the beginning of the year, when it exchanged 220.1 BTC for ETH. [ChainCatcher]