Why can't cancer cells get cancer?

Cancer cells are already cancer, it is redundant for a cancer cell to get cancer, however, it is true that cancer cells can die, for various reasons. The reason why cancer is so dangerous to the body is that cancer receives all the same support that healthy cells receive, and is not attacked by the immune system. The body takes care of its own cells; the blood supplies all the needs of cellular metabolism. That makes it easy for cells to survive. So even though cancer cells are abnormal and dysfunctional, they can usually survive because it is easy for them to do so.