Credit-card debt is surprisingly common among millennials, but many of them aren't worried about paying it off

Steve Rogers Photography/Getty Images More than half of millennials have credit-card debt, but some just aren't worried about it, according to a new survey from Insider and Morning Consult. Around 30% of respondents with credit-card debt have little to no stress at all about it. Credit-card debt can damage your credit score, affecting your ability to build wealth.