People have put money on the following proposition at Longbets.org:
"The first true interstellar mission, targeted at the closest star to the Sun or even farther, will be launched before or on December 6, 2025 and will be widely supported by the public."
What do you think? I certainly think this should be true, but I'm not confident that it will come to pass.
Note that longbets is a one-to-one wager site, not a futures market; those are cool because lots of people can get in on the action.