Cryonics could be made pretty cheap if lots more people signed up. It's only expensive because it's an extremely niche market. It's really a tragedy that cryonics isn't the default option. Even if you think it's unlikely to work, even a small chance at saving so many lives is worth it.

Cryonics almost certainly works. They use chemicals which prevent the formation of ice crystals. Which is like 90% of the reason most animals can't survive being frozen. They've demonstrated certain organs can be revived from cryopreservation - a rabbit kidney was frozen and then successfully revived. Which is incredible. And even if we don't have the technology to revive everything today, I do believe it will be possible in the future. The point of cryopreservation is that everything is preserved completely. The information in your brain - what makes you you, is preserved.