I've been monitoring the market for a couple of months now. Most of the coin value rely on the price of Bitcoin. If the BTC price goes up, every altcoins will follow and if it will goes down, the price of every altcoins will goes down as well. But the question is, Bitcoin price/value is still going up but the price/value of every altcoins especially Ethereum goes down. How did this happen? Any logical or scientific basis to explain this. As of now, I am still confuse. 
We consider this as a reality magic every moment of time everything is change. In life of crypto subject like altcoin their are many movements happen like upside down of the prices of the market. We can't magic if whether when will go up and down but the hoping is their that this will becomes stable. Many investors have their tactics and strategies, plans to be aiming as good, you can ask them for further information.