Well, you make a contract and pay money to the company that cryopreserves you. They could screw you over after you die, but that would be bad for their reputation and they could be sued.
Well their reputation will only come into play once the first sucessful resucitations are shown (or shown possible), which is far into the future. This risk-reward disconnect is dangerous.
Funny enough, he worked on Bitcoin, which may pave ways to Autonomous Corporations. In some time perhaps you could set a an autonomous corporation managing some funds in low-risk while delegating the surplus to payments conditioned on a "proof of conservation" of the body.
Yeah - more specifically, it's a nonprofit whose mission statement includes the mission to eventually restore to health all its patients. So, if you believe that nonprofits are generally going to at least try to achieve the thing they were created for, it would be surprising if they didn't try.
Not to mention that people working at Alcor are also members and believers in cryonics. They wouldn't screw you over because they wouldn't want anyone screwing them over when it's their time.
