Cameron and Tyler Winklevoss are one of the first bitcoin billionaires.
If the Winklevoss last name sounds familiar, they are the brothers who sued Mark Zuckerberg after they claimed he stole their idea for Facebook.
The Winklevoss twins won $65 million from the Facebook lawsuit, and invested $11 million of their payout into Bitcoin in 2013, amassing one of the largest portfolios of Bitcoin in the world.
According to Fortune magazine, when the Winklevosses first invested, the cryptocurrency was trading at $120 per coin, a far jump from the more than $11,000 it has reached today. That's an increase of over 9,000 percent.
Earlier this year, they attempted to create an ETF for Bitcoin, but fell short after the U.S. Securities and Exchange Commission rejected the application, citing the possibility of fraud.