The population in the west is already declining. Life extension would probably be beneficial and make the birthday decline even further. The alternative to cry

The population in the west is already declining. Life extension would probably be beneficial and make the birthday decline even further. The alternative to cryonics is total destruction of the human body with no possibility of being brought back. When given the choice between no chance at all and a chance, no matter how remote, of survival, picking the latter is the most rational approach (assuming your goal is not to die, of course). You seem to be under the misconception that cryonics promises bringing you back to life. It does not. It simply preserves your body, in the hope that future technology will be able to do that.