Bitcoin is a complex thing to explain, and the many misconceptions about it have to be addressed without losing site of the awesome strengths that underpin its revolutionary nature. It think "prezi" presentations are the ideal way to do this because of how they enable efficient and grounded visual communication.
Here is one I found about bitcoin as an example:
http://prezi.com/tbpky5fm7qbl/bitcoin-new-p2p-currency/There it's merely used to "jazz up" the presentation with panning and zooming, but this functionality can be used to keep sight of the big picture while delving into details and dealing with objections. It can be used to visually represent many things that would take too long to say in text. Images can be embedded, and Youtube videos can be viewed right in the presentation itself.
Plus it can be set to freely allow copying so that anyone can make their own branch tailored for specific audiences or for the purpose of easily recording a video with the prezi as the visual with voiceover. It takes about 20 minutes to figure out how to use the interface, and from then you can make presentations really quickly.
To get more of an idea of the potential for explaining stuff, here is one on the theory of relativity:
http://prezi.com/vgj5kiy-3zsd/the-magical-theory-of-relativity/
