In order for cryogenics to work, blood vessels have to be smaller. Successful attempts have been made with hamsters and the like. But as soon as you try with larger creatures, the evidence suggests that enabling unfreezing requires a way to undo (or prevent) catastrophic damage to any kind of tube, which - because of how temperature works with liquids - is basically impossible due to how long it takes to freeze larger things such as a human head or body.I've been reading on this a whole lot, and unless quantum physics change (and thereby the laws of the universe), the damage done with current cryo technology is too big to allow resurrection. That is, of course, not true if we somehow invent robots that can go in and 'remake' and/or undo the damage. But when we reach that point, the world is going to look way different. I don't think these facilities will be able to stay for centuries, and that's not even talking about the probability of the human race's self-destruction and/or proving that cryogenics is impossible if frozen without better technology.
A better bet would be the digitalization of the connections of the brain in a way that allows for replicating what they do, and how they interact.A large amount of research has gone into freezing things with the technology we have available, and it's not really a good way to spend your money. Try putting it into AI, and technology that would enable digitalization or better freezing, instead of literally fixing all the tubes in your body that inevitably are going to break because of the laws of the universe. I mean, that's where some of the money is going, right? Toward research into how to freeze humans or just smaller creatures, like rabbits, in a quick enough way to not destroy the innards of said bodies?I'm open for dialogue, but with the current state of technology, all you're doing is destroying the body and freezing it indefinitely, which again, isn't quite viable looking at how the world is going to change the next couple of centuries, just looking at landscaping and war.