Infinite Bloodcore - Chapter 288 - : Section 76: The Traitor Among the Fishmen!

A 30-year-old NEET is reincarnated into the body of an otaku that choked to death on instant noodles. As he comes to grips with his new life, he realizes that this world is subtly different from Earth. The denizens of this world are far better looking, and this new world also possesses futuristic technology as well as mysterious Yin Yang masters!

There is nothing in the world that cannot be solved by a transaction, if there is, then make a pure (ang) clean (zang) transaction.

If you say it, you may not believe it. The people who have traded with me are all over the world.

Trading is a great cause that is beneficial to physical and mental health and that people cannot refuse!

- Description from novelbuddy

The story centers on Adam, a young man living a life of extreme hardship. Betrayed and cast out by his own family at a young age, he is forced to survive on the streets, working grueling, low-paying jobs just to make ends meet. His existence is a constant struggle against poverty and despair.Everything changes when Adam discovers a mysterious application on his smartphone. This app has a single, reality-altering function: every time he taps the screen, one dollar is instantly deposited into his bank account.At first, Adam uses the app to solve his immediate problems—buying food and securing a place to live. But as he taps his way from hundreds to thousands, and then to millions of dollars, his ambition and vision expand exponentially. He transitions from a destitute outcast to a global magnate, creating a business empire that astounds the world.People point in awe and say, “Look, that's Adam's mobile company,” as they admire the most high-tech smartphones on the market. They marvel at sleek, futuristic cars on the road, remarking, “That car is from Adam's company.” His influence even reaches for the stars, with observers noting, “That new rocket company? Adam started that too.”

Perhaps it is the choice of fate. As a senior otaku, Qian Lingfeng got the “steel shell system”. However, when he swept the world with the system, became a local rich man, made all kinds of beautiful women, opened a harem, and realized the ultimate fantasy of thousands of otaku, he found that things seemed far from simple!
When the end comes, biochemical zombies suddenly come down, fierce beasts are in power, bloodthirsty zerg roam to kill the world, and human lives are comparable to dirt. Where will weak human beings go in this world? Is humanity going to be extinct? Or … can an otaku save the fate of the human race?

- Description from Novelupdates