It all depends on what the owner does with the coins. If he holds onto them and doesn't let anyone else get to them, maybe he's got some other kind of motive. But at this stage I don't think it's a big concern if he's just letting people mine away and get at them slowly. ETH is still very young.

There has been a lot of negative news surrounding ETH lately I just don't know who to believe anymore. Either people are trying to knock it down because it has too much value and they want their own altcoins to thrive, or there really is something shady going on behind the scenes.