You may tell yourself that you just want enough to be comfortable, but what if what you think is enough isn't?
In this decade at the beginning of the 21st century, over 90% of old people in this country retire without enough to live on comfortably.
Presumably they didn't plan for that to happen - it's a horrendous statistic covering an even more horrendous reality and something I wouldn't wish on my worse enemy, so if you would prefer a comfy old age then get the millionaire mindset and start taking some action.