The whole concept of "curing" cancer is silly, and best abandoned. Cancer is just the name we give to the failure of certain kinds of cell regulatory systems, particularly those relating to growth and cell death. Coming up with a "cure" for "cancer" makes no more sense than coming up with a "cure" for buggy web programs. Just like with web programs, there are certain common patterns in cancers that can be addressed and mitigated (XSS, estrogen receptors). But over a long time horizon, all complex systems have failure modes, and that's all cancer is.