What are atheists grateful to? Are you grateful to the Big Bang or evolution, or something that started the Big Bang?

Grateful to? Due to my short lifespan the initial expansion of the universe from the singularity and the evolutionary process has very little to do with me as I wont be around long enough to see the universe or our species, and the other species around the world, continue to change. And since there is no answer as to 'why' when it comes to the matter of existence then I'm left to decide instead how I feel about it, and how I feel about the fact that I am apart of existence and that I do exist, and that I came into existence without of my consent. So having said all that, I exist and I've not always had the best of it but I cant blame existence for that since it is indifferent; so what am I grateful for? I'm grateful for the things that make my time existing as peaceful, secure, safe, wonderful and joyfully interesting as possible. I say joyfully interesting because interesting doesn't always mean peaceful, secure, safe, wonderful or joyful.