Crazy Ideas

How great of an idea is it to write about crazy ideas? Why not?

Paul Graham wrote:

Anyone who has studied the history of ideas, and especially the history of science, knows that's how big things start. Someone proposes an idea that sounds crazy, most people dismiss it, then it gradually takes over the world.

There's something magical in ideas. We all can have them, and they can change the face of our world. But crazy ideas? They can change the face of the whole world.