What's your way to earn big bucks?

I'm coming back to the game, need to make a good bit of money. I've got stuff like an Anaconda, a Fed Vette, and a few other ships, some engineered parts like my FSD and Power Distributor, and a couple of lasers... But I need a way to earn some serious cash as a solo. I've got around 150 mil in credits, near a billion in assets