There are many bad coins, not all Alt coins. Onething I don't understand is why do we need so many platforms when there aren't many projects out there to use them?Also we have pretty much same number of exchanges available in count as total Altcoins. Crazy.
Agreeing with your statement is not that all cryptocurrencies will be zeroed, but the vast majority are really worthless.
Regardless, we can still find that there is a few projects have the future.