This is a practical tip that can protect your coins from being stolen in Galaxy life. By the time that you can be attacked by human players, you should have noticed that coins do not come easy in game. So you would like to prevent enemies from looting the coins from you.
What you can do is to fully fill out your warp gates with cheap galaxy life units such as marine. Then you can start making the most expensive units and let them queue inside the training camp.
Note that these units will not be made because they are under queue, however your coins have already been paid to the system. At this time your coins are in limbo where your enemies cannot touch them when they attack your galaxy life planet.
By doing this technique, you can safely protect a big chunk of your coin storage.