Millennials, no matter what you think about them, are making waves. They are now leaders of industry, business, media and retail. They are shaping the way we get information and goods. They can also be a bit controversial. But whatever you think of them, you definitely can’t ignore them -- especially Millennials as successful as Chris Altchek, co-founder of Mic.com, and Natasha Case, co-founder of ice cream company Coolhaus.