To Be a Mine Owner in Another World with an Upgrading Button

I, Garcia, a top student at Harvard University, traveled to a parallel universe because of an accident.
I became the son of a mine owner from another world. After my father died in an accident, only an abandoned coal mine was left.
Fortunately, I have activated the system, and all the things can reach the full level with one click.
Abandoned coal mine? It doesn't matter. I clicked upgrade, and it became a gold mine with astonishing reserves. It's gold everywhere.
Abandoned tramcar? It doesn't matter. I press the "upgrade" key to set the automatic tramcar on duty. After giving the order, it will work automatically and have no rest 24 hours a day.
A bunch of useless robot guards? It doesn't matter. I just pressed the "upgrade" button, which became "warrior". They even have human intelligence.
In a world with advanced technology, I am the underground king of this world who controls the biggest mineral vein. I will make the order of the world.