According to data from HODL15Capital, the Grayscale Bitcoin Trust (GBTC) had a net outflow of $90 million and approximately 1,420 bitcoins on April 18th. Since converting to an ETF, GBTC has had a total outflow of 314,225 bitcoins. Currently, GBTC holds 304,970 bitcoins, which is lower than the 620,000 bitcoins held in January when the fund converted to an ETF. GBTC has reduced its holdings by 51% in the past three months.