It's quite obvious to see Altcoins' orices dropping as the fork is near and most of them are awaiting for the airdrops of BTG.
Most of the people i know have sold their Altcoins to receive the free coins. That is the main reason why Altcoins have dropped.
The other reason is the increasing price of Bitcoin which has implemented a decline in Alts price making it drop gradually over the few days.
The Altcoins will rise after the fork when people will sell their BTC and invest in Alts. So don't worry and be patient.
This. Just this, as many others have stated.
The price fall isn't surprising, and this isn't an altcoin crash per se. I really don't see how alts would be dying, especially considering the number of good projects incoming and the sheer number of people willing to put money in them.
Greed is making the alts plunge, but it'll go back to normal in a few days. For the time being, alts are discounted, and it seems like a great time to fill some bags !