I have a question about cancer?

I understand cancer can be caused by different stimuli, such as some viruses, and cancer is a rapid reproduction of cells. So I was wondering since everything in the cells is controlled by its genome, would finding the genetic sequence that causes this rapid reproduction be the 1st step to finding a cure. And the 2nd being finding a way to turn off this sequence, such as with methyl groups. I am only a high school student and have only taken a basic genetics course with the farthest we had gotten to was protein synthesis and I learned a little about epi-genetics from reading an article in Time magazine, so my knowledge in this topic is far from being able to comprehend advance topics. I understand that all cancers are different and this would not work for every cancer, but just as a broad generalization, would this work or at least make sense.