I think by 2020, about 99 percent of altcoin is going to die, because their value is just speculation, but nothing.
BTC will probably become an altcoin in a few years, since its main value right now is speculation, to be honest.
Bitcoin will never be an Alt, it may lose value and other coins may overtake its price, but it will always be a trailblazer and record setter. Without bitcoin in its current form, there will be no cryptocurrency market, and we won't be year trying to speculate.
That said, a lot of ICO's, I predict over 90% will fail. I fear for investors, those who spread their risk will be fine, some will be lucky, a lot will lose.