Without knowing when you, yourself are going to leave this Earth, if you were able to donate a portion of your life [hour, day, year, etc.] to a loved one as you can now donate a kidney, would you?

It would be a gamble.
If it was your destiny to die in a car accident in 14 hours and you donated a day to your mother, you would expire immediately, and your mother would live your last 14 hours.

How much would an hour of your life be worth? Say Bill Gates was diagnosed with incurable brain cancer and started buying life in one hour increments. Would you sell? At what cost?

Or would you donate to keep someone like Stephen Hawking or some other brilliant contributor alive another hour? Scientist, artist humanitarian.

Instead of suicide, you could gift your life to someone that desperately wanted or needed it.