^Take comfort in the fact that this is all just Ethereans crashing out. It will be over before you know it.
Hasn't the overwhelming majority of the trading been eth/btc and nowhere near the main usd or one single Chinese exchange? In that case they're happily sat in BTC and not buying any more.
The Poloniex, Kraken, and Gatecoin BTC markets have been the highest volume ETH market today. The majority of ETH trading is in BTC not fiat. Most of the ETH traders will be riding the waves, selling the highs and buying the lows on the way back down, they won't want to sell their BTC for fiat when they can double up.