Mark Cuban, the billionaire investor and television personality, criticized the U.S. Securities and Exchange Commission for its inaction following the Mt. Gox debacle. Cuban also lauded Japan’s regulatory response to the incident. What Happened: Cuban took to social media platform X, to express his views on the SEC’s handling of the Mt. Gox situation. He contrasted this with Japan’s approach, which he commended for protecting its stakeholders. “The SEC didn’t learn sh*t. Not a damn thing when MT Gox happened. They are still so stupid they think the mere process of registration protects investo…