So, basically, we are not going to drop finasteride or hair transplants anytime soon.
No one knows if there is anything beyond the grave or why we exist this way. It's no use thinking about it beyond philosophy or religion. Any scientific approach to these existential matters has always been philosophy masquerading as science.
About cryonics, it's more likely that there will be a long blackout along the way, or a war, and all the frozen people will die if they weren't already dead for good. And there is no problem in investing 50k in cryonics and it is not stupid to believe in it. It is stupid to waste your current life bitching about it if there is a 99% chance that this is your only life. If you wake up in 500 years with a perfect body, your personality will be your most valuable trait. And nobody likes having someone around who just complains about things and is unable to generate a happy thought. There you go, lonely again. Now you will live 1000 years complaining about being excluded from the universal orgy that you probably think will happen.