This document discusses a theory of cancer cell metastasis. It proposes that cancer cells are parasitic and exploit other cells. It also suggests that cancer cell colonies should not live together, as having one cell become the source would turn all other members into consumers and produce waste. This would cause the cancer cell culture to deteriorate over time. According to the theory, each cancer cell lives independently and selfishly, wanting to spread to different areas and regions to find richer environments to thrive.