The rate of ETH/BTC has been falling from a high of 0.120 to 0.055. From here on it could go down to 0.025 or even lower if there's no reason to buy Ether. The Bitcoin keyword in Google Trends has peaked in January, so I think there's not a lot of new investors but we're just trading with each other, while some of us are cashing out, having a net negative effect on the total market cap.