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The ones currently "frozen" were done after they've literally died, so nothing can revive them.
There probably were some old, rich and dying fucks who paid shady doctors to get frozen alive in a way that makes most sense, but they definitely had clauses about not being unfrozen until somebody else survives that.
Hang out in dangerous places at nights OP, maybe you'll get kidnapped and bring us a cool story, assuming that you survive.