Coingen should put a limit on the block times and retargets, In this case The diff will get stuck on 500 for 2000+ blocks. And the dev wont have the knowledge to change the retarget to every block. So no exchange is going to list this, due to it will take 1 month to confirm deposits
Let me tell you a secret, coingen does that on purpose.
You see, coingen was created by one of the oldest bitcoin supporters and exists solely to discredit altcoins.
In the end, the buyer is left with a dead coin, and the miners have wasted time mining air. Everyone gets screwed – except the coingen operator of course. He makes a nice little profit on the whole ordeal.