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.
Ethereum is another alternative coins right after bitcoin. If bitcoin decreases the value of ethereum will decreases also. I believe also in the past that if bitcoin decreases people will buy ethereum but that is not 100% true. Most of the people are holding their bitcoin in to increased it's value in the future.