Nea, you will always get fluctuations. You need to research the triangle theory. What happens is you get buyers who buy it because they want it, and you get buyers who are sucked into they hype. After a while it settles and those who bought into the hype panics and sells which causes a slump. Those how bought it for the right reasons remain. (Decline and the second leg of the triangle. It normally doesn't fall below where the Hype started. Then you get your normal buyers that keep on buying as the prices are more favourable. Then you see the upswing for a while and hype starts again.
If you look at the Ethereum charts you will clearly see the triangles. Same with Bitcoin. Remember, Ethereum has no cap to amount of "coins" as it stands. This will change once they hit proof of concept. What happens after that is anyone's guess but it should not crash, not by a long shot.