When launching a business, investors become crucial to the future of your product. Nearly 40% of angel investors put their money in start-up businesses, but you'll tip the scales in your favor by developing a prototype to enrich your proposal. 1. Interaction A prototype is a physical object that investors can see and touch, which will give you a tremendous advantage during your sales pitch. The prototype creates a tactile experience that extends beyond figures and market data listed on a piece of paper.