There's a lot built on false assumptions here but one thing to note is cancer isn't a monolith, every tumor, every cancer cell is different and the result of many aberrations. Not sure what you mean by genetic code degradation but cancer cells are more proliferative than their tissues of origin by and large? Also aging, and the causes theirin is an entire field of study on its own, telomere maintenance is a big theory but immortal cells =/= long life. You need cell death to maintain and develop. Long story short not feasible.