Trade off

we can get everything so we have to choose. what is the trade of? for me,its the quality of life over the quantity of life.why extend life by life support machine? When its time to go,let nature run its course. why live so long when youve lost your mind to alzeiheimer or dementia or when your body is wrecked by constant agonizing pain.so euthanasia is the right to decide when we make an exit from this planet. but the state holds that right,not an individual.you do not have the right whether you want to be born,at least let a person decide when he wants to exit. thoughts of mortality keeps me up at nite. looking at the state of the world with risks of nuclear war n climate change and robots,why add another human to this planet?what does the future hold for a child born in the 21st century?