Pump and dump are very natural in the crypto world. you don't need to be panic. if you are a long term investor of ethereum plz don't panic. because its the queen of the altcoin. just add more ethereum when it dump 
personally I like ethereum. of course I am holding a few there and trying to add more ethereum when it dumps more. my first target for ethereum is $500 and 2nd target is $600 per ethereum.so anything before $400 ethereum is a blessing for mine
Thats right, its not unusual to see eth to turns up and down because it also happened before not only to this coin but for other alts as well. What matters is your belief, because even the price plunged but you believe that eth has a good future and will recover then there's no need to worry about the current situation. Just hold and forget for a while the price. personally I like ethereum. of course I am holding a few there and trying to add more ethereum when it dumps more. my first target for ethereum is $500 and 2nd target is $600 per ethereum.so anything before $400 ethereum is a blessing for mine