Become a Boss of All Worlds or Something

My name is Lin Nan. I own a world-traveling system and have become a speculator in all worlds. I can travel from the world to the present world, and from the present world back to the world, and jump repeatedly across several worlds. I resold various supplies in the apocalypse and became the largest weapons manufacturer, food provider, and slave operator in the apocalypse... I became the most mysterious company CEO in the world, developed quietly, and finally became a blockbuster, becoming the largest gaming company, technology company, and entertainment company in the world... Black bullets, slashing red eyes... I, Lin Nan, am cunning and cautious. Silent development is my kingly way, and reselling materials is my old profession. In the end, although I became invincible and slowly retreated to the background, I still continued to control the puppets in front of the stage. I eventually became the most powerful person behind the scenes in all worlds. Ps: This book is written by the same author, and the male protagonist kills decisively. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.