Millennium Management, one of the world's largest hedge funds with $48 billion in assets under management, is reported to have had exposure to Grayscale Bitcoin Trust (GBTC) as net asset value (NAV) fell steeply in March, according to TheStreet Crypto. Shares of GBTC have spent a majority of the last six weeks trading negative to NAV, presenting a challenge to investors and funds that implemented the infamous arbitrage trade. It is notable that GBTC is still trading at a steep discount to NAV, despite attempts from Grayscale to get the shares back to trading at a premium.