Some days I'm sure you've wondered "why bother?" Life can be rough. There are no guarantees that the things or the people you love are safe, even with all the precaution in the world. I'm sure they wondered the same thing.
You keep their memories alive, and that means something. Someone remembers. When you go, someone will do that for you, I'm sure.
Its not what you take when you leave this world behind you. It's what you leave behind you when you go.