On Monday, billionaire Elon Musk said that college is "not for learning."

The times are changing when it comes to college degrees. One third of billionaires in 2016 didn't graduate, and these eight leaders agree that a degree may no longer be necessary.

Gary Vaynerchuk says there are "endless free ways to learn about business" — and points out that many companies don't actually require a degree.

Time is money, says Grant Cardone. Consider whether college is actually a worthwhile investment.

For Gail Corder Fischer, not having a degree helped her strengthen her work ethic and problem-solving skills.

Society places a lot of value on higher education, even though nearly a third of billionaires in 2016 didn't actually graduate from college, including Bill Gates, Sir Richard Branson, and Mark Zuckerberg.

We spoke with several entrepreneurial leaders and Advisors in The Oracles, who all agree that you don't need a degree to be successful. Here's why — and what it actually takes.