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!
but NOT ALL Alts are not scam
There Are More Than 36000 Altcoin Out There (Bitcointalk Altcoin ANN Sub-Forum)(Token Included)
Only 2000 Listed On CoinMarketCap (Around 6%)
And I Believe Only 1% That Are Really "Good Coin"
Most Of It Failed Because Bad Dev,And Has No Community Support