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Quarterly Statements of Operations - Summary of Quarterly Statements of Operations (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Expenses:                      
Sponsor Fee, related party $ 113,468 $ 88,407 $ 87,601 $ 71,085 $ 57,738 $ 68,252 $ 103,668 $ 131,025 $ 360,561 $ 360,683 $ 615,420
Net investment loss (113,468) (88,407) (87,601) (71,085) (57,738) (68,252) (103,668) (131,025) (360,561) (360,683) (615,420)
Net realized and unrealized gain (loss) from:                      
Net realized gain (loss) in Bitcoin 78,005 52,764 52,169 35,868 21,558 31,890 67,520 95,096 218,806 216,064 470,168
Net change in unrealized appreciation (depreciation) on investment in Bitcoin 9,555,222 (2,134,266) 1,131,742 7,475,264 (1,874,275) 347,631 (17,156,233) (284,294) 16,027,962 (18,967,171) 10,099,600
Net realized and unrealized gain (loss) on investment 9,633,227 (2,081,502) 1,183,911 7,511,132 (1,852,717) 379,521 (17,088,713) (189,198) 16,246,768 (18,751,107) 10,569,768
Net increase (decrease) in net assets resulting from operations $ 9,519,759 $ (2,169,909) $ 1,096,310 $ 7,440,047 $ (1,910,455) $ 311,269 $ (17,192,381) $ (320,223) $ 15,886,207 $ (19,111,790) $ 9,954,348