I think the best elevator pitch I've ever read about, was the one given for a TV show.
Having very little time to convince the executive of what his show was about and the value of it as an investment, his pitch was:
"MTV Cops"
The series was Miami Vice.
The concept was about a couple of young guys combining music, clothing styles and the ambiance of Miami with a traditional cop show. It worked.
It's simple, gets right to the point, while allowing the investor to imagine all of the possibilities involved with it as an investment.
While I won't be able to participate, I think we need to distill the essence of STEEM down to something short, punchy and memorable.
The pitch "MTV Cops" also linked the show with an established brand and demo. Best wishes to everyone submitting! :)