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Input: "Millennials are making really good decisions whenever they have an opportunity to save more  " Arielle O'Shea   retirement and investing specialist at NerdWallet  told Business Insider.
"Millennials are doing themselves a big service here by saving so early and taking advantage of compound interest  " O'Shea  said.
 It 's possible older Americans aren't saving as much because the cost of raising kids increases the older they get   O'Shea  said  especially when parents "start feeling the crunch of college."
"Everyone can use strategies millennial parents are using  " O'Shea  said. "Save more when you get a raise  when you pay off debt  or cut back on dining."
That's great for some people   O'Shea  said  but "knowing how much you need to be saving is huge  and working toward a goal makes all the difference."

Millennials are saving twice as much as baby boomers