The Naruto world keeps playing badly in order to survive

Do you like to tank? I do! But there are too many people in this world who prevent me from tanking! What should I do? Don't worry, there are more things that will give you a headache, such as...reincarnations or time travelers? The protagonist has gone through the Second and Third Wars, and has been struggling to become a peerless tanking ninja! But what if he accidentally became a technology tycoon? Everything is based on life first, and you have to survive. You may not be invincible for the time being. The protagonist has sympathy but not much, and he will not be a good person. He pays more attention to feelings... So the protagonist of some Naruto characters is powerless to save, because the protagonist does not know whether he will die. Maybe...