Remove the production limits on the bit mine. There's a surplus on money and upgrading the mines is kinda pointless and way to long to have a limit. The mixer should mix the "money" to create more bit coins. The anti virus should be more difficult to get in this game. The purpose should be to create better hacking programs and more difficult to defend. I'm not sure what happened to my account but I had to restart it and this really sucks plus I purchased 5 bucks and didn't receive anything.