Mark Karpeles was the CEO of Mt. Gox, which for some time was the largest Bitcoin exchange in the world until it collapsed in 2014. Set up in 2010, the Mt. Gox exchange has reached its peak by 2013 when it was handling up to 80% of the world's Bitcoin trading volume. It suspended operations in 2014, and then filed for bankruptcy, with a millions of dollars worth of customers' funds being lost. Karpeles was subsequently charged with embezzlement by the Japanese authorities (Mt. Gox was based in Japan). His trial is still ongoing as of 2016.