Well honestly its a few price decrease but i think the price will no longer down below 420 and there's no dumping its just some traders are converting their bitcoin into ethereum.. because of continues price increase .. but sooner they will convert back to bitcoins..
Whilst I understand the logic of BTC holders converting BTC to ETH, causing BTC to sink against ETH, I have yet to hear a good reason why BTC users converting to ETH, also causes the BTCUSD value to decrease.
Perhaps you are the very man who could enlighten me?