One of my neighbors is turning 105 this Wednesday. He grew up as a jew in the lead-up to Nazi Germany, avoiding getting trapped there, and led a relativly adventurous life for many years after that. He wrote two autobiographies, and was married for over 60 years. He was volunteering to do repair work around the neighborhood and going on regular bike rides up until he was almost 100.

His wife died about 5 years ago. He's nearly blind and deaf now, yet he's have experienced almost no cognitive decline. He regularly plays chess and bridge and is as good as he ever was. He enjoys telling stories about his life and the things he learned abroad.

His children and grandchildren and great-grandchildren have started visiting more and more frequently, and some are living with him now. Nobody talks about it, but it seems they're just waiting for him to die.

I'm on good terms with him and his family. I've been playing chess with him since I was a kid. I don't know if he'd even understand the concept of cryonics if I tried to explain it to him. Given his health, it would likely be more a matter of convincing his family than convincing him. His family isn't super religious, but I doubt they'd be a fan of the idea.

I don't know how much money he has left, but at the very least he owns a large house in an upper middle class neightborhood, which could be sold to pay for it. I doubt his family would be a fan of that idea either.

I don't just want to do nothing and watch him die, but neither do I want to damage my relationship with his family (and all my other neighbors and my parents, who they'd surely tell) if it goes poorly.