I've never gotten the thinking on the whole cryonic thing, with people being frozen after they die. I mean....you're dead. It's a little late at that point, isn't it? So you've gotta wait not just until whatever disease killed you is curable, you've gotta wait until somebody cures death. It's not quite as simple as just jump-starting your heart long enough to inject the disease-cure and letting it work until suddenly you're alive and recovering. Especially since terminal diseases tend to ravage your body and organs before finally finishing you off.
So to be realistic, you'd have to be frozen sometime before you died - long enough before that your death wouldn't be like imminent after you were thawed and resuscitated. But if you're not so far along that your death is imminent, how do you really know how much time you have left? You could be trading a couple of good years that you could have enjoyed living, to wait for a train that ultimately don't come. And there's also that freezing a living person is, well, murder, and a permission slip isn't a defense (just ask Armin Meiwes).
You are making a bet that they find a cure for what killed you *and* the damage that freezing causes (which isn't trivial). The progress of medical science in recent decades is nothing short of amazing. When I was in college, researchers were just figuring out how to sequence DNA using crude methods. Today they are fixing genetic defects in utero. So the bet that they can *eventually* fix you is not an irrational one, merely a long-shot. Even a 1 in 1000 chance is better than being certainly dead and decomposed.
Some people will take that bet. Most won't, because they would rather the $150K or whatever the procedure costs these days go to their family when they are gone. Or their religion tells them they are going to a better place or coming back. Or they don't think medical science will *ever* get that good. You seem to fall in that last category.
No, you can't take a living person and turn them into a corpsicle. That is indeed murder. You can have cryonics staff on hand for when the doctor pronounces the time of death, and they jump into action immediately, but not before that.
My personal expectation is rather than bringing back someone in the flesh, we will instead scan and upload them. We have scanning tunneling microscopes that can see individual atoms. You take a corpsicle, scan their body at an atomic level, one layer of atoms at a time. This gives you a full 3D model, despite the freezing process introducing ice crystals and cracks and other damage. You can undo those things in software, and build a software version of the person at whatever level of detail is needed for consciousness. Likely that is somewhere between atomic and neural map levels. Then give them a robot body, or a virtual world to live in.
