To many, this might sound as an obvious question. “Hey, this deck is here to get my idea funded!” While this might be the ultimate goal of your presentation, it is usual to break down the process in its individual steps.
The objective of a short elevator-pitch-like-chat or coffee discussion is not to receive the investment, it is to get to the next meeting. And reaching that next stage involves intriguing your audience enough, maybe leaving out some of the tedious detail, while not forgetting to completely nail that big elephant-in-the-room-issue (even if it means going into excruciating detail).