Is Cryonics a pipe dream?

Can we just put someone in stasis and bring them back to life in the future, when medical technologies reach the stage that brings deads back to life? The notion of putting humans in cryosleep is well-liked in science fiction movies. But what about the real-life, can we cheat death and skip the critical thumb rule of the life cycle. Well, the Scottsdale Arizona-based Alcor Life Extension Foundation, the self-proclaimed world leader in Cryonics, gives an alternative to that. The company sells the hope for a second chance of life in just a quarter of a million dollars and looks after around 200 dead bodies dipped in liquid nitrogen. The persons preserved here have been declared clinically dead. But Alcor believes that it is the technical glitches of organs than just being pronounced dead. "Our best estimates are that within 50 to 100 hundred years, we will have the medical technologies needed to restore our patients to health and function," says Linda Chamberlain, one of the founders of Alcor Life Extension Foundation.
When a patient (dead bodies) arrives, each of them goes through a technical process that increases the chances of survival. These include treatment with chemicals and drugs, and then carefully, the body is lowered into a big steel tank of liquid nitrogen (-196 degrees Celsius). According to Ken Miller, Professor of Theoretical Science at Columbia University, New York, we are a long way from understanding how the human brains work. Hence, Cryonics is still a pipe dream.