I Power the Three Realms

A pile of scrap paper my grandfather left behind turned out to be the universal currency of the Three Realms. I've become a billionaire! I was hit by a car and nearly entered the cycle of reincarnation, but a piece of waste paper suddenly changed the King of Hell's heart and granted me an infinite lifespan! Look at me, I'm living a life without regrets, holding the Three Realms in my hands and proclaiming my heroic spirit!