it just can't be long strait except if dev does nothing.
That's it right there. Want to know what kills a coin -- DEV abandonment. Nothing else to it.
You only need to look at Guerrillacoin (GUE) to see that massive devastating dump that happened there. DEV skipped town on a project he knew was going nowhere and no one was willing to pick up the pieces and carry-on.
The key feature with CANN is that it's a coin with real world transactions happening every day.
That alone makes it a top 5 coin.