According to official data from Grayscale, as of January 29th, the Bitcoin holdings of its spot Bitcoin ETF GBTC has fallen below 500,000 coins, reaching 496,573.8166 BTC with a market value of approximately $21,431,132,778.35. The current circulation of GBTC shares is 555,700,100 with each share holding about 0.0008936 BTC.