Rebirth Is Also an Idle Fish

Reborn as a five-year-old with extra-dimensional powers. I wanted to be a rich man and live my whole life. Only to find that the world has changed drastically, and aliens are full of malicious intentions and want to enslave humans. What would you choose? Should he continue to be a salty fish, or kill him and turn everything upside down. Or take the third path and jump repeatedly between salted fish and killing.