God-Tier Cash Back: Binding Myself to Goddesses Makes Me a Trillionaire

Looking for Rich-Protagonist Stories: No Dumbed-Down Characters, Lavish Spending, No Keeping a Low Profile, and Ideally Real-Life Figures

I want a story where the protagonist gets rich from the start, with little showing off or face-slapping. Keep it somewhat realistic, with all kinds of extravagant spending, and have them gradually enter elite circles. It’d be great if real people appeared in the story, too, to make it easier to immerse myself.