An older man sits on the  beach, looking out at the sea
David Kirsch, 64, (not pictured) is worried his Social Security and 401(k) won't be enough to live off of in retirement.
  • David Kirsch, 64, worries he won't have enough money to retire comfortably in a few years.
  • He's one of 30 million Americans known as "peak boomers," a group born between 1959 and 1964.
  • Many of these boomers are worried about having enough to stop working and cover their expenses. 

David Kirsch is hoping he can retire at 70.