Ethereum price have jumped from all time high $400 per Ether to below $200 which is more than 50% dump within 30 days. Every altcoins along with bitcoin are dumping quite hard for last few days and many believes this dump is chain reaction triggered by FUD about possible hardfork on early august after activation of segwit2x. People are selling their altcoins to hold bitcoin and get coins in both chains after network split/hardfork. On the same time many traders are selling off their bitcoin with panic. In view of some experts, It will be wise decision to keep your alts and bitcoin safely in addresses that are in your full control (you have private keys) till segwit activation. Keep calm because patience is key for success in crypto trading.