The Wall Street Journal writes on "The Shadow Dollar That's Fueling the Financial Underworld." The article explains, "A giant unregulated currency is undermining America's fight against arms dealers, sanctions busters and scammers. Almost as much money flowed through its network last year as through Visa cards. And it has recently minted more profit than BlackRock, with a tiny fraction of the workforce. Its name: tether. The cryptocurrency has grown into an important cog in the global financial system, with as much as $190 billion changing hands daily. In essence, tether is a digital U.S. dollar -- though one privately controlled in the British Virgin Islands by a secretive crew of owners, with its activities largely hidden from governments." It continues, "Known as a stablecoin for its 1:1 peg to the dollar, tether gained early use among crypto aficionados. But it has spread deep into the financial underworld, enabling a parallel economy that operates beyond the reach of U.S. law enforcement." The Journal adds, "Tether is arguably the first successful real-world product to emerge from the cryptocurrency revolution that began over a decade ago. It has made its owners immensely rich. Tether has $120 billion in assets, mostly risk-free U.S. Treasury bills, along with positions in bitcoin and gold. Last year it generated $6.2 billion in profit, outearning BlackRock, the world's largest asset manager, by $700 million. 'We need a regulatory framework that doesn't allow offshore dollar-backed stablecoin providers to play by a different set of rules,' Deputy Treasury Secretary Wally Adeyemo told The Wall Street Journal. Adeyemo singled out tether in April testimony before Congress."