Eth has become popular, do you know the reasons?
I think people are too stress with BTC decreasing, then they sell BTC out to buy more ETh.
You are forgetting something though since the fact that the bitcoin is going down that means that the price of ethereum is going down too and if we are really looking at the coins you will realize that ethereum has actually gone down faster than bitcoin and it has lost a higher part of its value since the coin started going down which makes bitcoin the better choice