Live by Free Will, Die by Determinism

After reading some works on Nietzsche, I was surprised to learn that Nietzsche was a determinist. My initial impression, due to the extensive amount of time and words he devoted to the concept of Will to Power, that he’d be more of a Free Will proponent. Nietzsche’s logic was this: there are possibilities and there are actualities. What is possible strives to be actual. He believed there to be multiple universes, each one different only in one way, one possibility. If in our universe, I flip a coin and come up with heads, in another universe it will come up with tails. That makes two possible universes. If I attempt another coin toss and this one comes up tails instead of heads, then there will be four possible universes with the two attempts as: HH, HT, TT, TH. Each subsequent throw will generate more possibilities, to infinity. The question comes in now: what do we consider is “real?” Are possibilities considered real, or only what is actual? How do we know if there are other actual universes? Is our universe the only actual universe that exists? If possibilities are considered real, then I must agree with Nietzsche and take up the position of determinism, for then in our universe, all possibilities are already set for the past, present, and future. If possibilities are real, then it stands to reason that anything we can conceive of is real. If I can conceive of the possibility of sprouting wings and taking up flight, then in another universe, another possibility, it will actually happen. It will be actualized.
So now that we have established what it will mean if we consider possibilities to be real or not real, we can look at it in a different light. Which belief is more useful to us? Even in the event that possibilities are real, therefore other universes exist, leading to determinism being true, I would still live as if I had Free Will. Why? Because I believe it will serve me better. Determinism does not really help me make decisions in life. It does not truly explain what to do or how to act or think. It is more of an explanation of how the world works, much akin to Hobbes’ Social Contract Theory. I would keep in mind and be aware of how determinism works passively in our lives, while actively utilizing the belief of having Free Will. Living with the belief of having Free Will encourages us to take responsibility for our decisions in life, which I believe is healthier and helps us excel, in whatever sense we choose, in whatever endeavor we choose. Adopting determinism will more likely encourage a lack of personal responsibility and promote blame placing, in my opinion, because “it’s not my fault, it’s just fate/destiny.” It is my view that people are more ready to use anything available to them, such as a belief, a philosophy, or a “truth,” as an excuse and a crutch to lean on, rather than to go through the growing pains of learning to stand themselves. Therefore, even if determinism were “true,” I would still advocate living as if we possess Free Will and accepting Personal Responsibility (which I believe to be healthy and helpful in life) as a result.