I think it went below $600 yesterday or two days ago right? But look at it now at $800, I think it will only take days for ETH to claim its position at $1k rate again. Too bad because I wasn't able to buy ETH at $500-$600 rate as it seems that it will also be the last time that we will see ETH at that price.
Ethereum may go under $600 but it will again move upward. And we cannot predict its price on at what value will it go down or on what price it will go up. The only thing I know is that when it go down its our chance to buy it in a lower price.