I think cryonics is about as useful as all those old tombs in Egypt. We could probably clone some of those body's and reviving people from cryonics might be an interesting experiment for our decedents but in both cases much of that dead person will have been lost. And trading resources in this life so that some shadow of me might show up in the future is not worth much time. So yea it's the best hope we have now, like it was their best hope back then, but all they are talking about is imperfect copies.