Actually, no one can have an idea when it will go down to $600 but there is still a possibility that it will gonna reach that value. Each and everyone of us here in the furom experienced a massive downfall unexpectedly and some speculations that it will gonna worst on the next few days. On my opinion to those users having a huge amount of shares should hold as much as possible which I also do the same thing. Also, those users have an extra amount, it's the best time to invest since it is still a cheap amount and affordable to buy those ethereum and bitcoin or other crypto currencies which are relying on the ethereum and bitcoin.