Why Alt coins aren't reaching its peak and what affects the prices

Let's take a look at the few currencies like Ripple, Game, Bitcoin Cash, Ethereum and Neo.
These are one of those currencies/tokens which can do better, well in-fact it by now it should have done better than its current prices.
When you try to go though their partnerships, news, developments etc. You will realize that these currencies are undervalued.
Like this one

or this

or this (info : Red font put by me)

or this
https://techcrunch.com/2017/06/08/how-ethereum-became-the-platform-of-choice-for-icod-digital-assets/

this I thought was huge

These coins does go up, but in a while all comes down to its stable value. This happens because of the traders who makes their quick bucks by dumping huge amount of coins all at once, and where buyers are trying get some coins based on the news thinking the price might sky rocket. This dumping competes with each other so the coin starts falling again after a while, and once it comes back to where it began "the show is over".

This brings down the price back to square 1 that doesn't happen in case of Bitcoin because the demand is already high and there are many HODLers on it.