ETH has entered the 'Greater Fool' territory. The sell liquidity is crap. If you have a large volume you pretty much need somebody to buy it from you, because the buy market is thinly spread. I sold my Eth a few days ago. I should have held a bit longer, sure, but I look it in 2 ways, Profit or loss? Now many have bought at extremely low prices as I did, so losses are not even a concern. However, It is a major concern for anyone who recently entered. I'm not saying it won't go up more, but rest assure, what goes up must come down. Nothing goes up forever; heed the warning.
Although there is truth in some of your words, the same has been said for the past week even at prices like 500-600. The actual truth is that nobody knows where it will go because this is actually an exciting projects backed by institutions, banks, companies not like other altcoins that are made for a bunch of nerds concerned about privacy to buy drugs. That's what killed the whole scene, Ethereum is the first project (a very professional down, top to bottom) that will cater to a very interested audience. Of course it can become a little irrelevant with the course of the months and years and that's about it.
However, it holds the chance to completely change the way we do things, banks for example are looking for a blockchain standard, imagine if in some months the major banks start to adopt Ethereum not just flirt with it? And then comes development of dapps, etc, that's why there's so much interest in it, the potential is really unlimited.
The other projects are just nice hobbies compared to it, taking out all the BS bitcoin clones, nobody even uses Bitcoin they sure won't use freaking Litecoin or Dodge or whatever privacy enforced sh*tcoin they are pushing. It won't happen.