I have two things here. One which doesn't matter, I suppose, and one which certainly does.
The first one - I am 74 and am so about half way between retirement and probable death. Thats OK nothing lost - death is an old friend at my age.
The other - just being diagnosed with Parkinson's Disease which is the brain slowly destroying itself over the years, leading to disability, probably ending in a nursing home. There is no cure.
And that scares the hell out of me!