perhaps ETH price has nothing to do with what BTC is doing...
perhaps as more people are becoming aware of the potential of cryptocurrencies and seeing what they missed out on by buying BTC, they see greater opportunity with ETH as it's price is relatively low and figure it's a wise investment to jump on now...
perhaps ETH is a wise investment and there's more attention on it now, as there's been lots of news on all the different developments being built on the platform...