first of all this is not a bitcoin "dump" it is a drop. and you should really know the difference between these basic things if you are in a trading discussion board otherwise it is a better idea if you stay away from trading.
secondly whenever bitcoin price drops, the altcoins go down with it. and a quick look at the altcoin market shows that this time the altcoins are going down like always so there is no exceptions happening here either. in fact one of the reasons why the altcoin market is turning into a big bloodbath is exactly these bitcoin price rise and falls since altcoins go down in both cases.