Odaily Planet Daily News: According to Bloomberg, citing Delaware court documents, hedge fund Fir Tree is suing cryptocurrency investment company Grayscale to obtain detailed information about its Grayscale Bitcoin Trust (GBTC). Fir Tree hopes that Grayscale will reduce fees and resume redemptions to solve its discounted trading problems. Currently, the discount of GBTC is as high as 43%. Grayscale Trust is the world's largest publicly traded cryptocurrency fund, with assets under management of up to $10.7 billion. It allows investors to gain exposure to Bitcoin without directly purchasing assets.