"The course of human history is strongly influenced by the growth of human knowledge. [But it is impossible to] predict by rational or scientific methods, the future growth of our scientific knowledge [because doing so would require us to know that future knowledge, and, if we did, it would be present knowledge, not future knowledge.] We cannot therefore predict the future course of human history." - Karl Popper paraphrased from the book Future Babble by Dan Gardner
This is why Cryonics is currently a waste of money and resources.