Doge is done.  The next halvening will really put the hurt on it as more and more miners will be getting out.  But that isn't even its real problem.  Its problem is that there is NO DEMAND for the coin.  That is why the price continues its steady decline.  

I think its the community that ended up killing it.  The reddit sub is full of a bunch of wannabe hippies posting pictures of doges, moons, and other general bullshit.  No one is ever going to take that coin seriously.  That is the main reason behinds it's demise.  It started off from a joke and its still a joke.