Mark Cuban owns 30% ETH because itâs âclosest to a true currencyâ Mark Cuban recently stated that Bitcoin is a better alternative to gold, and compared Ethereum's smart contracts to the internet boom of the late 1990s. 6161 Total views News Billionaire Mark Cuban believes Ethereum is the closest thing we have to being a true currency and views Bitcoin as a better alternative to gold. The Shark Tank and Dallas Mavericks co-owner made the comments as a guest on a recent episode of the Delphi Podcast, where he noted that the growth of DeFi and NFTs had made him excited about crypto. He explained that âsmart contracts and the fact that they're decentralized" means "there's no one in charge right there, the governance is completely different. That's what changed the game.â