Austin, Texas (CNN) For years, Cameron and Tyler Winklevoss were known for the company they didn't launch: Facebook. Now, the pair hope to be known for their bet on cryptocurrency, which they liken to a different kind of social network.

"Money is the oldest social network and arguably the strongest," Cameron Winklevoss told CNN Business at SXSW in Austin. "And crypto is one of the strongest networks of value ever in the world and will continue to be so, so hopefully [we'll be] pioneers in that space to some extent."

The twins, who spent years in litigation accusing Mark Zuckerberg of stealing their idea and received a $65 million settlement , have made a name for themselves in the cryptocurrency space by becoming some of the first bitcoin billionaires and launching their own crypto exchange, Gemini, to buy and sell digital currencies.

Despite the volatility of cryptocurrencies -- with bitcoin soaring to around $20,000 and now sinking to just below $4,000 -- the brothers remain bullish on its future.

"Yes, there's been some ups and downs in between, but overall if you zoom out long enough, the trend is going in the right direction," Tyler Winklevoss told CNN Business at SXSW in Austin. "The graph is still up and to the right."

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