WHEN I'M OLD

What will it be like when I'm old and grey 
Will my memories remain or will they fade away 
My walking may be impaired and I may need a stick 
Illness may take over and I may get terribly sick

When I'm old will I contract a fatal disease ?
Something like hypothermia causing my body to freeze 
I'm 50 now and old age is starting to set in 
Getting out of my comfortable bed is becoming a sin 

What will it be like when I'm old and grey 
I only wish I knew but I cannot say