Opportunity to do a presentation on anything, what should I do it on?

Going for a job for I.C.T with Visa (transaction company), 12 places are going with 24 people doing the same task as me. I have to prepare a presentation on anything I like, and do not want to end up doing a presentation on anything which is too obvious. I'm considering a presentation on a conspiracy theory or politics, they are using this task to find out my way of thinking and presenting my work I believe due to them wanting a presentation on anything. Thank you!