Fair Value of Bitcoin - Schedule of Changes in Quantity of Bitcoin and Fair Value (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2026 USD ($) Bitcoin	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) Bitcoin	Jun. 30, 2025 USD ($) Bitcoin	Dec. 31, 2025 USD ($) Bitcoin
Fair Value Disclosures [Abstract]
Beginning balance \| Bitcoin			38,468.0468	40,289.1335	40,289.1335
Purchases \| Bitcoin			7,610.7077		21,837.2036
In-Kind Creations \| Bitcoin			1,770.6288		124.9948
Sales for the redemption of Shares \| Bitcoin			(10,157.5133)		(23,701.7104)
In-kind redemptions \| Bitcoin			(1,444.3602)
Bitcoin transferred for Sponsor Fee \| Bitcoin			(39.8179)		(81.5747)
Ending balance \| Bitcoin	36,207.6919		36,207.6919		38,468.0468
Beginning balance			$ 3,367,647	$ 3,762,723	$ 3,762,723
Purchases			613,156		2,290,437
In-kind creations			127,362		10,884
Sales for the redemption of Shares			$ (782,370)		(2,351,927)
In-kind redemptions \| Bitcoin			(102,536)
Bitcoin transferred for Sponsor Fee			$ (3,025)		(8,220)
Net realized gain (loss) from In-Kind Redemptions of bitcoin	$ 36,526	$ 0	45,336	0
Net realized gain (loss) from investment in bitcoin transferred to pay Sponsor Fee	643	1,032	1,455	2,183	5,019
Net realized gain (loss) from investment in bitcoin sold for redemptions	(3,801)	21,271	(35,191)	45,121	(42,062)
Change in unrealized appreciation (depreciation) from investment in bitcoin	(360,422)	$ 940,462	(1,105,844)	$ 464,101	(299,207)
Ending balance	$ 2,125,990		$ 2,125,990		$ 3,367,647