Well @mikeshuh... I know what you are saying makes sense in a certain perspective... I remember to see some retired people loosing almost all their money because Enron stocks got bust.
However, personally for me, even if I was 65 years old, I would do all in! If I don't get rich before 70 years old? When I'm going to get rich? If I have only 10 more years to play, I'm gonna play bold!!!