He transmigrated to the Naruto world with a shop that lets him trade in anything.
So Lin Fan put the advanced trading techniques he learned in the Arad Continent to use, selling capsule toys and fleecing customers.
Uchiha Sasuke: “I can get stronger by opening capsules, and if I get stronger, my brother will acknowledge me. Even if it costs me everything, I'm buying them!”
Uchiha Ming: “As a transmigrator, how did I go ten years without punching the Otsutsuki and kicking Kaguya's ass? Now my fellow countryman is still treating me like a cash crop, and I even have to thank him after he's done harvesting me.”
Sarutobi Hiruzen: “I never thought I'd get my youth back. I can stay Hokage for another fifty years!”