This has been the trend ever since, after we reach a higher price it will always go down but I don't see any reason to panic with this one because ETH was able to go up high when it hits the bottom. Now, we have another opportunity to buy so don't panic with this one.
The price pump easily but the same thing happen when its dumping.
Learn from this chart, and you will see a great pattern!
This is reasonable because BTC is down after few weeks up, this is mandatory and definitely happens but I think the price of BTC is not below 4000 $ and after this, BTC will rise again and followed all altcoin including ETH.