Human life expectancy has been increasing rapidly because of better health care facilities, hygiene, ample food, and increased access to life-saving drugs. The number of persons aged above 80 nearly tripled globally over the past 30 years and stood at 143 million in 2019. It is expected to triple to 426 million by 2050 and then double again to 881 million by 2100 (Source: UN World Population Prospects 2019). By the end of the century, one out of every 12 persons in the world is expected to be above 80 years of age. While planning for retirement, most people usually