More college investors use CDs/savings accounts (48%) and 401(k) retirement accounts (33%) than tax-advantaged 529 education plans (31%). In fact, of the $1.9 trillion in total college savings, less than one-quarter is held in 529 plans. Key takeaway: College investors often choose accounts that don’t maximize their growth potential or tax savings. Moving that money into 529 plans could get it working harder for a child’s future.