Though it seems like just yesterday that millennials were bopping away to “Get Low” in the club, they’ve now reached an age where retirement is on the horizon. After growing up during periods of broader financial tumult — and having their love of lattes and avocado toast unfairly blamed for it — many millennials may assume that retiring wealthy simply isn’t in the cards. To paraphrase another popular song from their teen years, they’d better lose themselves in the moment of smart retirement planning. Bar ...