I've been quietly trying to grow my factories without anyone really catching on to how much I've stacked. There currently isn't a leaderboard for PWRcrystal holdings or factories but if there was I am certainly I'd be nearly at the top of that list.
I currently have around 1,250 mines and my goal is to drop maxed out factories on them all be able to produce 1,250 PWR crystals every single day. Those levels of production would be absolutely insane for where the game is at right now and it would really put me in a good position to be selling crystals for a long time still until others were able to catch up more and be self-sufficient in terms of crystals production.
In either event, I'm probably a few days or so away from finally being completed with this project after an incredibly time intensive past month or so.