It wont go to 600. It didnt have the same run as other alt coins - so folks are making a switch to litecoin from the other dumb coins that have jumped too high.

What you will see is a consolidation in bitcoin price before it rallies again. Most alt coins will see a drop esp. as ethereum sells off when ICO eth money raisers start selling to cash out. Unless LTC starts going ahead of BTC roadmap (switch to 2MB block size) and starts seeing more acceptance from merchants, it wont go to $600.

I think it will hit 100 in a year.