Just a protip. I've been trading on crypto exchanges for the past 3 years now, and the ones that started allowing multiple coins that weren't listed on CMC100 just became shit exchanges. These are exchanges that would allow any coin on their exchange as long as they paid for a spot... If you want any kind of future with serious traders, you should avoid making the same mistakes, or you're going to end up with an exchange with a shit ton of users that will start overloading your support with tickets for $10 worth of trade value exchanges. And then calling you a scam publicly when you don't respond within an hour
While the idea for your universal crypto exchange is great, you're essentially intertwining your own rope until it becomes long enough for you to hang yourself. 0% trading fee for 3 and a half months? I'm going to make a prediction and say that by May 1, you'll have slowly started abandoning this project. This is a whole lot of work for no return. Don't forget, you're going to be spending the majority of your time answer support requests.
Don't mean to come off as a pessimistic asshole, but just trying to show you the reality of what you're breeding, based on the experience from having seen this from the other side.
Good luck to you; I really hope you know what you're getting yourself into!