Im looking for novels like Very Pure and Ambiguous, I'm in Hollywood, Extraordinary Genius and Game Market 1983. I want the mc to use his future knowledge to make money and stuff.
Hiya! I have a few of them to suggest. The Rebirth of the Malicious Empress of Military Lineage Mei Gongqing Doomed to be Cannon Fodder (Complete) These are all really good! Well written/translated. Enjoy.
Rebirth of the thief who roamed the world Master Hunter K King of the Battlefield God of Cooking I'm in Hollywood Reincarnator Etc
Tales of Demons and Gods - Makes money, but is more focused to making himself stronger using prior knowledge to battle the last boss. It's a really good story, but unfortunately the author is slacking, so is only 1chapter/month now. Hidden Assassin - Makes money, but hides that and also hides his strength since he wants to lead a normal life.
I kinda wanna recommend Thousand Face Demonic Concubine but she uses it for revenge... ( she does make money as well since she buys all the shops and everything but it's just a passing scene when she's plotting ).
Top Management - MC randomly gets vision of the near and distant future. It's not necessarily that he uses it specifically for money, but considering how successful it is it's definitely a nice added benefit God of Music - Very similar to TM, but rather than focusing on one manager and the idol group he's managing, it's about an MC that is a bit higher up in the entertainment industry so the focus is on a lot more characters (to the point where it's almost a bit hard to keep track of them all)
Dominion's End is a good one, though the focus is more on having the knowledge and skills to survive the zombie apocalypse than making money. Perfect Superstar's MC is totally using his new knowledge to make enough to eat though. Unfortunately there aren't many chapters out and translation is irregular. Great Tang Idyll uses future knowledge in the most adorable way ever, as the MCs get reincarnated as babies in ancient times (these are some black bellied babies bro). Release that Witch also uses modern knowledge, but that opens up a whole new can of novels in alternate worlds so...IDK if you read those too.
I'm Really a Superstar seems to fit what you're looking for pretty well, but not exactly. It's a good read full of face-slapping nonetheless, and I highly recommend it.