Einstein proved that time-travel is theoretically possible. Even though, they will probably never achieve it in our lifetime, you may still have the opportunity. A Time Travel Fund has been setup that will pay for your future "retrieval" should time-travel be invented. With a mere $10 investment, the group promises to continue operations hundreds of years into the future, living off the compound interest. Once time travel is feasible, they will travel back in time and retrieve you.

While this is probably a complete waste of money (as if the lottery isn't), I have to say it is much more intriguing than something like cryogenics. Why pay $100,000 to keep your body frozen until they find a cure to whatever ailed you, when you can simply pay people in the future to come back and get you, or to push you out of the way of that bus. Just think, you could choose to be taken immediately, and "disappear" right after you join.