Life expectancy at birth has been increasingly constantly over the past few decades and now there are more than seventy thousand people in the USA alone and substantially more globally mainly in the developed part of it. A staggering number of people are expected to live up to longer than one hundred amongst those born over the last decade. Such changes lead to newer challenges and opportunities. With people living longer, they need to work out ways to save money the best or work till a much longer stage of life. If seventy is the new sixty, then millennials need to be prepared to work till their late seventies or else the government will have to bear a massive burden. In addition, constant business innovations mean that older technologies or lines of work are getting redundant and people will need to go for skills upgrade at the middle stage of life.

Source: https://hbr.org/2016/06/how-work-will-change-when-most-of-us-live-to-100