When deciding on a topic, it is most important to consider YOUR AUDIENCE AND WHICH TOPIC WILL INTEREST THEM.
In public speaking, the audience is very important. In choosing a topic to talk about, a speaker needs to be careful to choose a topic that will be of interest to his or her audience. In order to be able to do this effectively, the speaker has to analyse its audience and get all the necessary information he need about them then tailor his speech accordingly. The public speaking will only be a success, if the topic interest the audience.