Good way to get the investor to trust you is besides great idea a transparent bank account of how much money is raised everyday day and on what the money is spent.
maybe now there aren't many who do that, where many projects are not transparent about the issue of funding revenues. it makes an indication of manipulation. it might be possible to make it attractive, but fully I don't think it will have a big effect.
investors are looking for products that are already running and are a solution to what has not been found on the market. when there is a project that gives it, I think any marketing strategy can make investors interested.