Mike Novogratz's crypto firm Galaxy Digital started trading on the Nasdaq on Friday under the ticker GLXY. The stock opened at $23.50 per share on the U.S. exchange.Galaxy Digital, which has been traded on the Toronto Stock Exchange since 2020, shifted its shares to the Nasdaq through a direct listing — a move that follows a grueling, multiyear battle with U.S. regulators.Novogratz told CNBC's "Squawk Box" on Friday that Galaxy's value now hinges on two high-growth areas: crypto and artificial i...