The_Bum
You see Bum. You are quite mistaken. Every novel in the top 100 is in fact a fanfic. They all rip off the same idea of rocks.
The top mech story? Just rocks melted down into metal fighting other rocks.
Naruto? Everything is made up of very tiny rocks called atoms. These tiny rocks form different bigger rocks such as people, buildings, weapons, and rocks. The people rocks live in building rocks and fight each other with weapon rocks.
My own novel is also just rocks. Rocks form machines to make steam. Steam is just wet rocks that are hot and light. It's all rocks.
Everything I wrote above is bad satire.