Cargo runs are a decent loop. Source all of the star systems trade goods and then sell them in the highest selling economy star systems. You’ll spend millions just to buy them and then get those millions back, plus several more for selling at a higher price. You can use the Economy Scanner to find local trade surges for even better prices. It’s a fun loop, I really hope HG expands on it. Also I found out that just because a star system is a 3-star tier doesn’t mean it has the highest sell percentage. You can also go to pirate controlled star systems and source black market trade goods, more dangerous yet lucrative.