Hi Chuck,
If you're only 69, flying regularly and still in good physical condition, I don't see why you shouldn't expect at least five years of flying ahead of you, and probably more.
I earn my living giving advanced flight instruction and also still fly unlimited aerobatics with no decernable degrading of my performance.
IIRC, you don't possess an instructor's rating, right? That makes you a dangerous criminal!
See generally the silly comments made on pages 3 and 4 of
this thread.
Cheers,
MLS