Parsing Out the Lies by 'The Block' Here Bill Miller did not "take the plunge" with GBTC. The SEC filing linked in the article just reveals the
total holdings held by the Miller Opportunity Trust (name of Bill Miller's fund). 'The Block' claimed that, "Billionaire fund manager Bill Miller has taken a significant position in Grayscale's Bitcoin Trust, according to a new filing with the SEC.
Here is that filing - https://www.sec.gov/Archives/edgar/data/0001261788/000114554921051047/xslFormNPORT-P_X01/primary_doc.xml