Cryonics, is the victory of hope over scientific knowledge.
Most of the body is water and water expands when it freezes. Although the flowing body fluids are replaced by some type of antifreeze and the body is frozen very slowly, the water in every cell in our body cannot be replaced and when the water in the cell expands the walls of many cells will, almost certainly, rupture. When this happens to the brain cells that puts paid to any chance of revival
When there was all the interest in cryonics after the young teenager asked for it, I read a long article that investigated the subject and the facilities in the US where the bodies were stored and one technician admitted that using specialised listening devices they could hear the sound of rupturing cells taking place in the freezing pods.
Regrettably, or not, once you are dead, you are dead, and no cryonics method now being used is able to preserve you undamaged so that your corpse is still viable when a cure for your final disease is found.