Having knowledge of the chosen career is one of the first steps to attract an audience selected and who is really willing to invest in the property you offer. No use to open a particular company only because that sector is promising, you need to master it, know your history, what their prospects are, who your competitors are, what is the public profile (beyond financial default). Moreover, it is also necessary to know the background your product or service, all other possible information.
Your target audience tends to rely more on speaking knowingly than who is mere propaganda. Thus, if in addition to investor you are a connoisseur of that segment, you may expose such knowledge in general and specialized media, becoming a reference. It's just so you will get better credibility.
Exercise your ability to engage the public
You can be provided with content, but if you do not know engage your target audience, nothing will advance. Your speech needs to be enthusiastic and charismatic, to convince people that you believe what you're saying!
Think of the most charismatic public person you have ever seen. Thought? You can be sure that, even though she has a natural talent to communicate, reached its current level through a lot of training and practice. There is a popular belief that charisma is something essentially natural, that either you are born with or without. But this is not true, however shy a person is, you can learn anything with determination and preparation.
I will let wise words of a person who inspired me a lot Albert Einstein.
"Insanity is always continue doing the same thing and expect different results."