So what is difference between your "service" and that being provided by some legit traders in the "Currency Exchange" section?

Rate is having a less priority. Trust has more priority. Why would I trust you and send you my coins?

Irrelevant if there is no method to trust the parties involved. Do you even intend to use an escrow intermediary?

The demand is always there if you know how to generate it and how to catch on current trends to gather people. But nobody would trust you with their money just like that.