Mark Cuban Predicts Blockchain Is The New Internet Cuban said that Ethereum has an advantage over Bitcoin for regular joes. In brief He’s a huge fan of DeFi in general and smart contracts in particular. He doesn’t believe crypto will be accepted as currencies, however. In a podcast, billionaire entrepreneur, investor, Shark Tank star, and owner of the Dallas Mavericks Mark Cuban sat down with The Defiant to talk about why he’s bullish on crypto in general and DeFi in particular, and why he’s still skeptical about Bitcoin as a currency. Over the hour, Cuban remained adamant that Bitcoin isn’t a currency so much as it is a store of value: “To this day, I’m not a believer that Bitcoin will become a currency,” he declared. “What’s really changed was that people started recognizing that it’s only a store of value.”