Somebody here said, "see zec, even eth crashes, zec will be good to mine", and my reply was simple, if it was not for eth or btc, zec would still be 0.04 btc. These people that think just one coin crashes are dumb. If bitcoin crashes, all crashes, if eth crashes all might crash, if zec crashes some might crash, it depends how important that coin is for the market as a whole. Cryptocoins are all linked noobs, call it a chain reaction from the most important coin to the least important coin.