Facebook Idea - An idea that’s so dumb it somehow becomes the next big thing

An idea that’s so dumb it somehow becomes the next big thing and you become a rich idiot.

I made a app that lets you fight your ex in a virtual duel. Now I’m rich and my ex is still a pain in the ass.

My idea was to sell cereal to cows. Now I’m rich and my cows are still fat.

I thought of a video game where you fight ghosts. Now I’m rich and my ghosts are still haunting me.