This reminds of something I think about occasionally: if someone put a gun in my hand and a gun to my head and told me to kill someone else or die, I wonder if I would take the bullet. Better to die innocent than live as a murderer, right?
As for the question, I’m not sure. Call me cruel or calculating, but I think there are some relatives I wouldn’t die for because I think my continued existence would contribute more to the world than theirs would. I can imagine giving my life for one of my brothers, but maybe not the other ones (does my doubt make me a supreme asshole?).
As for material objects, there isn’t a single thing worth more than just being alive. How about body parts? I’d give up my legs rather than die. All my teeth too!
I think I might rather die than lose my sanity. I think I have a fear of being crazy.