Ripple (XRP), one of the top 5 digital currencies by market cap and widely hailed as a revolutionary bridge between the cryptocurrency space and the traditional banking world, has come under fire by a disgruntled investor. The investor, Ryan Coffey, has filed a class-action lawsuit against Ripple Labs Inc., the company that controls the currency, and its CEO Brad Garlinghouse, alleging that Ripple violated both federal and state-level securities regulations in the way that it sold its tokens to the broader public.