Outflows from the Grayscale Bitcoin Trust may be reaching an equilibrium after months of investor selling, Michael Sonnenshein, CEO of crypto asset manager Grayscale Investments, told Reuters on the latest episode of Inside ETFs. Grayscale has battled to retain dominance of the bitcoin exchange-traded fund (ETF) market since rival offerings from nine other issuers emerged in January, after the U.S. Securities and Exchange Commission (SEC) approved the launch of the products after a decade-long tussle with the crypto industry. Total outflows from Grayscale Bitcoin Trust (GBTC) in the last three months topped $15 billion, according to data from BitMEX Research, although the surge in bitcoin's value has helped ensure that Grayscale's assets under management have dipped only slightly to $23.13 billion.