First, one of the world's largest Bitcoin exchanges went dark, then it filed for bankruptcy, suffered further hacking attacks and even faced a lawsuit. Now Mark Karpelès, Mt. Gox's CEO, tells the Wall Street Journal that he's liquidating what's left of the company assets to make ends meet. "As the company head, my mission was to protect customers and employees," he said in the interview, his first public appearance since Mt. Gox collapsed. "I'm deeply sorry. I'm frustrated with myself." A court-appointed trustee now holds all of the exchange's remaining funds and assets, and is preparing to auction off domain names owned by the companies to help repay creditors and keep Tibanne -- Karpelès' other business -- alive. This includes selling bitcoins.com and akb.com. Karpelès didn't say if mtgox.com itself would be up for sale, but he is worried about its future.