Yes, colorectal cancer is curable in the early stages. Finding cancer (or pre-cancerous cells) early and treating them promptly gives you the best chance of a cure. Early treatment is easier on you (and less expensive) compared to late-stage cancer treatment.
However, if the tumor is advanced, or has spread to other parts of your body, it can be fatal. More than 50,000 people die of colorectal cancer every year in the United States.