You need capital, people, connections, and other criterias to make this the next billion dollar app. And, then you speak about possibility of replacing Uber. The market out there is cauldron of entrepreneurs in obsession with their idea; everyone thinks they have got something groundbreaking. However, the ones with genuine idea start at remotest possible level, bootstrap as much as possible, and let the concept speak volume about its potential. During this entire process they become aware of their limitations and choose appropriate partners. I believe you should start somewhere and you'll know the guys to look out for.

In my one decade of experience around hand-holding startup entrepreneurs, and helping them establish profitable business venture, I've seen a lot of them hinging everything on investment. A few of them actually invest energy and effort behind gauging true potential of their idea. If you are too confident about the success of your idea then pen down "How" and approach the people you find having credibility. It's not too challenging to identify such lot on social media. Hope above helps!!

Feel free to reach out for anything in particular that you may be looking at.