Whether it's creating a movie or writing a story, the only limit is your own imagination.  Just think how many people in this world have wrote excellent stories with infinite possibilities. I say...ANYONE CAN WRITE. IT'S the only matter of your creativity and imagination that prevents you to write over a certain extent. I wrote my first story back when I was around 6-7 years ol.  It was a short story that I wrote on papers based on time travel..surprisingly I was inspired by the TV show Ben 10 back then. So I wish to all readers and writers out there, never give up on a good story,  the  knowledge you'll get is priceless.