Do the hateful people live longer? Is it just karma?

That's what my mother in law used to say - that the evil nasty people live the longest. Is that a good thing then, that I am ill and going to die before I should? Does it mean I am a good person? I've always helped others, and tried to do the right thing in life. So, I always think of myself that way. People tell me I'm inspirational. In reality, I'd rather be less inspirational and healthier, and live longer, no offense to those who are finding inspiration from my life. Yes, I still look healthy, but knowing that cancer will eat me alive eventually is not comforting. Does it mean that I've learned all the lessons I'm supposed to so I don't need to continue on? Who knows. Is it karma? What lessons is my life teacher others? Is that part of my karma? Maybe someday I'll understand it, but probably not and it is ok. I can still die in peace.