ya . I sometimes wander off and fly in a hauler loaded with ammunition I bought in one place to the other to sell it for more.
I picture then someone with a burning cigar in his mouth sitting in the cockpit hauling 30.000 m³ of explosive ammunition .
The thing is prices dont really fluctuate enough in safe space. You can earn money that way that's for sure but its pretty boring. What would be an idea is to acquire the skills for a cloaked hauler. With that if you managed to operate it well you can get the best prices in insecure space or even pirate space.
But again this requires lots of playtime you need to substract from your real life :/.
Another idea is to place buy orders in several regions. You can for example place buy orders for things that are hard to transport (cause they take up massive amounts of cargohold) in lowly populated space and that way buy items for cheap prices.
You could specialize on a jump freighter for that.
I for myself want to go down the mining and production path. That's the one takin the least time of your real life time . There is just always the chance that your invention jobs keep on failing and that can cost you. But then again in the long run you can get the datacores for the jobs by research agents and can reduce the costs for the job by significant amounts.
All pretty cool, that's for sure .
Sonner or later I will go into piracy, I know it