Well this is what the insightful Tone Vays claims...
He claims that ETH, DASH, shit 99.5% of all the ALTS are scams and the only coin that will survive is Bitcoin.
So l guess we should all sell our Alts now!
I agree that most altcoins are scams but I wouldn't include in this list such altcoins as Ethereum or Dash etc. I think that not only Bitcoin will survive but a small amount of most popular altcoins