Board Thread:Game Discussion/@comment-28168845-20171001095935/@comment-32145034-20171001110133

Simple rule: Maintain always a healthy 1500-2000 GC for all the opportunities to invest them in something that is worth it. Once you reach that point, you can start progressing those GC Milking Series, and be sure to buy every car on discount while still at at least 1500 GC in the bank.