The Cassandra Curse: Why Does Cant anyone listen to her?

To me the Cassandra curse is very interesting, because it shows that you need to listen to people if something bad is coming, The Cassandra Curse is about a girl named Cassandra who can see the future. That's pretty crazy! That should make her the ruler of everything, right? Well the truth is no because no one believes her, no matter what. She predicted many bad things that happened and still no one believes her! What would you do if someone came to you, and told you a disaster is coming? What would you say? What would you do?