I think it is because of bitcoin price is down too deep and it seems, it makes people be afraid to hold altcoin for a little longer. I hope they are wrong and this will push the altcoin price become high later. I see the altcoin goes down although not all altcoin goes down, the effect that I feel is people getting rush and I hope they don't panic to see this and still hold their altcoin. but I don't know the main reason for this downfall and I only can wait for a while.