Why is cancer is considered a disease in the cell cycle?

According to Dr. Otto Heinrich Warburg(Nobel Prize Winner 1931), cancer cells change from being 'Aerobic'( oxygen-fueled ) to become 'Anaerobic'( non oxygen-fueled ), actually sugar-fueled!
As oxygen can no longer be absorbed by these cells, our organs begin to break down and the cancer cell's need for sugars, robs our bodies of their vital nutrients.
In this state, oxygen can no longer be tolerated and actually becomes a poison to the cancerous cells, and in their drive to survive they enter into the blood stream and travel to other areas of the body to multiply, utilising the old adage of safety in numbers.