in case of this particular altcoin (ethereum) the price recovers only because it has too many whale manipulators who will prevent the crash of it and will push the price up again. you can see their huge buy walls on poloniex each time price is getting dumped pretty hard.
actually altcoins have never had the increased emphasis! it is all about bitcoin and it has always been like this. people want bitcoin and that is why they trade altcoins. they do it to make more bitcoin when they make a profit.
Beware of losses and ensure you pick the right one as otherwise the opportunity may pass by.
I want to agree with "altcoins following the bitcoin rise" but this has so many exceptions that the rule itself does no longer apply. I mean in the past there has been multiple occasions that altcoins did not follow bitcoin and they even went the other way.
That is right. The spread between bitcoin and altcoin could be wider.