Coinbase, the biggest U.S. cryptocurrency exchange, moved a step closer to listing on the Nasdaq with a filing on Thursday to go public, revealing that it had swung into profit last year as bitcoin surged. Approval from the U.S. Securities and Exchange Commission for a listing would represent a landmark victory for cryptocurrency advocates, vying for mainstream endorsement for a sector which has struggled to win the trust of mainstream investors, regulators and the general public. It would pave the way for the highest-profile share listing of a company whose business is primarily focused around the trading of ... (full story)