The fact the freezing process destroys the cells is all you need to know that cryonics is bullshit.
There are a few ways to extend your life or consciousness, but the technology isn't there yet: a) cellular repair via nanobots gives you the same body for years to come; or b) high resolution brain scans to effectively digitize your brain.
I think if someone was desperate enough to preserve themselves today, I would go for the brain plasticization route. Then, hope one day that you can be scanned in and have your consciousness revived. Although here's something to ponder: would you really have a continuity of consciousness with that method...would it be like waking up from sleeping?