You have to realize that we're not launching our demo, we have the demo as a mini-preview to show to Angel Investors, in return for a early seed stage funding cycle.
the best way to get funding is to put your product in the hands of your users. unless your idea is a out-of-this-world idea, you're likely going to need to show the investors that your product is in high demand on the market and that you've gained some sort of traction already.