The Time Travel Fund [1]:...

The Time Travel Fund: "We establish a fund in current time. You make a small contribution to the fund, and in a few hundred years that small amount grows to a very large amount. From that fund, moneys will be taken and used to retrieve you, perhaps seconds after you join, perhaps even moments before your recorded death, perhaps some other point in your lifetime. Further, the fund may even pay to have you "rejuvenated" medically (assuming this is scientifically possible at that time,) and support you financially for a number of years. (Note: Retrieving you just before the moment of death is just one possible scenario, but one that would avoid any Star Trek(TM) type paradoxes. There are an unlimited number of other possibilities, and we do not know what they will do, we can only make reasonably informed guesses.)"