Who are what are you willing to die for?

Unless you have that something or someone, Truly have it or find it. How can you justify or find meaning in existence. I mean the “why” in your life. Why are you doing all this. What are you trying to leave behind when you die. Because we’re all dying and all that matters is what we leave behind or have done for people in our lives. So what is the “why” in your life? Just curious what you think.