The craziest ideas are often the ones that make the most impact. Think of innovators like Elon Musk and Steve Jobs. The very thought of a touch screen mobile smartphone or luxury electric cars probably sounded pretty crazy, and maybe even impossible, to a lot of people. J.K Rowling thought of the fantastical but completely insane sport of Quidditch, and was rejected many times before someone saw the magic in her ideas.
Be a rebel. Question the status quo. Believe in your crazy ideas. Be a changemaker.