Representations of the Ripple, Bitcoin, Etherum and Litecoin virtual currencies are seen on a PC motherboard in this illustration picture, February 14, 2018. REUTERS/Dado Ruvic/Illustration Register now for FREE unlimited access to Reuters.com Register SINGAPORE, May 13 (Reuters) – Cryptocurrencies nursed large losses on Friday, with bitcoin pinned below $30,000 and set for a record […]