Both coins are currently red. Btc has fallen as low as below $9000 and Eth has gone as low as below $700. Both are volatile but I would prefer to trade Eth for Btc. This is because if cryptocurrencies gain grounds again, of which will definitely happen, and they begin to increase in value, I see Btc to rise higher in terms of percentage to Eth and for that matter stands the chance to gain more profit with Btc