The price of ETH is falling today and hitting $310 as I write - whilst this is painful to see from it's $418 highs, this is a well needed correction and a possible buying opportunity.
Ethereum is a game change and will transform our lives over the next few years, but the price has risen too high due to speculation and people not understanding the network - the price is actually not even anything to do with the Ethereum Blockchain technology - ETH is a unit of currency traded on the technology, just like you can trade STEEM
Yesterday there was another crazy ICO raising millions in a few hours - whilst this may seem great on the surface, it is not great for the short term trading - people are selling ETH to buy these new coins
But remember, ETH is the "gas" used by all these Ethereum based ICO's to trade and transact - this means that ETH will be the long term winner :-)