I know I’ve lived a privileged life, so I was thinking I could write about how I think it’s important to acknowledge what you have so you can use it to help others. Is this too tricky, or too arrogant, or negative in general??
I would venture to say it is not a unique topic. I think it could work but I think it would just be better if you wrote how you personally have helped others without focusing on the priviledge part of the equation. Always have others vet the essay.
I don’t think this is too unique, and would easily come off as arrogant unintentionally. Maybe think of a specific time you’ve helped others?
thanks for the advice! @bushdynasty and @magnetnh! I was planning on rewriitng my essay anyway, but since I’ve already written it I was planning on getting someone to read it anyway. 
It’s not unique but that doesn’t mean it’s not a good topic. Most of the things that college applicants write about are not unique. The goal is not uniqueness of the topic; the goal is originality in the way you cover the topic and convey something about yourself through it.
I agree with potentially narrowing the focus on a specific instance of how you’ve used your privilege to help someone, or even the moment when you recognized that you had privilege and what it conferred upon you. (The latter topic, I think, would be very fresh and original.)