The past 10 years have seen millennials dealing with all sorts of financial hardships.<br />But according to Business Insider, there might be a brighter future waiting for them in the next decade.<br />In the 2010s, millennials struggled to build wealth amidst the fallout of the recession and crushing student-loan debt.<br />That's because millennials are likely to enter their peak earning years.<br />They're also likely to couple up, thus becoming members of double-income households.