Somebody may risk their funds if they are convinced about your "idea". However, you need a very comprehensive plan before someone will truly risk their money like covering all angles of the business you want to explore with. Failure is easy to come up with if you are not ready to tackle the business. And very few can actually deliver their objectives within the timeframe as planned. Hence, not many people are relying on plans only. They need to see your history also. So that's another facet here. You are not only convincing people about how good you can generate an idea but how solid your foundation is to come up with such idea.
I agree with that. A pitch is not just a verbal representation of a business idea or an investment proposal, but it needs to be backed with solid proof of success in similar ventures you have been into in the past because that is the only thing that will convince the people who you are pitching the idea to. As an investor, I wouldn't be interested in anything if they are just presenting something without showing any success proofs and maybe a portfolio or something that tells me that the person is capable of managing my funds very well.
So someone who is to pitch a Bitcoin investment idea, they need to make sure that they have been making such investments in the past and they have gained success in terms of getting profits from those investments and they should be able to demonstrate that in their pitch to have a higher success rate for the pitch.