Thought experiment to judge the value/cost model:

Imagine if the revival of a cryonically preserved consciousness required, once thawed, sustaining the mind in an expensive machine which played back its memories at a cost of X per minute of life experience. Without this procedure, the mind would be that of a newborn, and with it, they are fully restored.

Further assume that you are alive at the time of this revival, rather than the person who is preserved.

How much X would you pay, if you were able, to revive a loved one? A stranger? At what point does the cost of X exceed the cost of birthing a whole new person to take their place, should you so desire?

Under this model, cryonics is a choice of very low maintenance costs to preserve the mind until such time as X swings in favor of restoring the preserved person, hopefully with the collective action of those whose preferences are inclined toward paying a higher X (cryonics advocacy groups like Alcor).