What is happening is that currently the altcoins are facing a price correction after an insane climb in mid-late June. Soon, the price will stabilize and it will soon recover again and break new highs soon. I am not surprised if ETH breaks the $600 barrier by the end of this year. Well, I guess u just gotta be patient 
It is just like the real world where stocks rise and dip in value every second.
It is just like the real world where stocks rise and dip in value every second. I think $600 is not a problem if the ETH is developed more in the future.