Broke for the New Year? I Got Rich Picking Up Trash in Another World

I didn't have enough money to go home for the New Year, so with nowhere else to turn, I took a job cleaning up a dumpsite in another world.

What the people of that world call scrap is treasure to me: rare fruits and plants grow across the hills, along with birds and beasts, and even eggs that haven't hatched! Piles of rare mineral crystals as big as my fist, advanced tech components a thousand years ahead of Earth's technology just lying around, the wreckage of crashed interstellar battleships, and broken pocket dimensions large enough to hold a city!

And that's not even counting withered divine trees, scrapped mechs, the bones of divine beasts, and even shattered divinity!

These become the foundation of my rise on Earth.

When I go home for the New Year, my relatives ask what I do for a living.

Me: “I recycle garbage, and pick up the occasional secondhand interstellar battleship.”

They laugh and call me a liar. Then another world invades, and the whole country panics.

I quietly return to my dumpsite and bring out, from a corner, a rusty… planet-killer.