Free Will vs Destiny

I believe that Free Will and Destiny are mutually exclusive possibilities, and nobody can really know the answer as to how/why we are here. Though I lean more toward life being complete free will, some things in your life you cannot control, such as your parents, your ethnicity, your gender, where you live, etc. and because of this I don't think everyone has equal opportunities to fully accomplish what they are completely potential of. I think if someone has the potential genius to become the best astro-physicist in the world and come up with many answers to the universe, but they are born into extremely low poverty like in India or Sudan, they cannot reach their full potential no matter how much free will they have. They just happened to be born at an awful background which they couldn't control, and therefor couldn't focus on education and becoming so successful. So though I think life is fully free will, I think there are different limits for different people as to what they can do with their life. I believe that everything is based on probability, and until something actually happens, all of the possible outcomes are happening at once. I am also open to the theory of a multiverse(infinite parallel universes), and to the theory that we don't even exist. Our life is based on perception, not reality, so it's possible that everything we experience and see is merely an illusion.