Lessons from Narcos on Netflix – Why do they never have enough money?

After watching the 4th season of Narcos, it hit me. No, I am not talking about every drug lord ending up dead or in prison. No, I am not referring to the fact that there will be drug lords as long as there is demand. I want to highlight how they always run out of money. How can you run out of money? The Cali cartel made up to $7B per year at the height of their criminal empire.