You want much Gold?
Then start the First Level in the First Chapter. Just take with you a Teleporter and some Miner with you.

What we want?
Kill every Dino exept for the last one. The last one, we want to send in a permanent circle with the teleporter. If you place everything like in my Screenshot it should work. Now farm so much Gold you want and when you are ready kill the last Dino.

I hope this tip can help someone :)

For a Like I would be thankful ^,..,^