I wish I could save someone’s life at the cost of my own

Think about it, my life means nothing,
absolutely nothing,
but there are many and many ppl who wanted to live a bit more, have more time in this shitty world
why can’t I trade my life for theirs? life could be theirs, and i would have my sweet sweet death, win-win, and the world could even forget my existence! how beautiful would it be, finally on death’s embrace while knowing that your miserable useless existence at least saved someone.