Fair Value of Investments in Digital Assets - Changes in Quantity of Each Fund Component and Their Respective Fair Values (Details)												3 Months Ended								12 Months Ended
	Apr. 03, 2024 USD ($)	Jan. 04, 2024 USD ($)	Oct. 04, 2023 USD ($)	Jul. 06, 2023 USD ($)	Apr. 05, 2023 USD ($)	Jan. 05, 2023 USD ($)	Oct. 05, 2022 USD ($)	Jul. 07, 2022 USD ($)	Apr. 05, 2022 USD ($)	Oct. 01, 2021 USD ($)	Jul. 01, 2021 USD ($) Quantity	Jun. 30, 2024 USD ($) Quantity	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) Quantity	Jun. 30, 2023 USD ($) Quantity	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($) Quantity	Jun. 30, 2024 USD ($) Quantity	Jun. 30, 2023 USD ($) Quantity	Jun. 30, 2022 USD ($) Quantity
Summary Of Investment Holdings [Line Items]
Balance at Fair Value															$ 272,632,000					$ 272,632,000
Net change in unrealized appreciation on investments in digital assets												$ (70,306,000)	$ 225,325,000	$ 134,194,000	(32,520,000)	$ 11,690,000	$ 110,821,000	$ (30,709,000)	$ 31,065,000	256,693,000	$ 122,867,000	$ (230,026,000)
Realized Investment Gains (Losses)	$ (8,236,118)	$ 7,968,963	$ 149,939	$ 906,943	$ 227,762	$ (7,304,129)	$ 1,133,040	$ (14,895,069)	$ 12,437,503	$ 14,980,028	$ 11,651,902	(5,574,000)	$ 10,033,000	$ 1,343,000	$ 1,701,000	1,055,000	$ (6,745,000)	$ 1,397,000	$ (14,421,000)	7,503,000	(18,714,000)	$ 46,849,000
Balance at Fair Value end												$ 526,956,000				$ 272,632,000				$ 526,956,000	$ 272,632,000
Bitcoin
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											7,340.02142854				6,230.97866186				6,231.4365404	6,230.97866186	6,231.4365404	7,340.02142854
Quantity contributed | Quantity																				0	0	13.24337963
Quantity distributed from portfolio rebalancing | Quantity																				(87.42054382)		(955.65065367)
Quantity contributed from portfolio rebalancing | Quantity																					157.11106568
Quantity distributed for Manager's Fee, related party | Quantity																				(153.06326914)	(157.56894422)	(166.1776141)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0	0	0
Quantity, Net realized gain (loss) on investment | Quantity																				0	0	0
Quantity, Balance end | Quantity												5,990.4948489				6,230.97866186				5,990.4948489	6,230.97866186	6,231.4365404
Balance at Fair Value											$ 255,175,000				$ 189,185,000				$ 117,743,000	$ 189,185,000	$ 117,743,000	$ 255,175,000
Fair Value, contributed																				0	0	612,000
Fair value, distributed from portfolio rebalancing																				(2,751,000)		(40,252,000)
Fair value, contributed from portfolio rebalancing																					3,049,000
Fair Value, distributed for Manager's Fee, related party																				(6,964,000)	(3,549,000)	(7,160,000)
Net change in unrealized appreciation on investments in digital assets																				180,523,000	69,386,000	(125,363,000)
Realized Investment Gains (Losses)																				10,994,000	2,556,000	34,731,000
Balance at Fair Value end												$ 370,987,000				$ 189,185,000				$ 370,987,000	$ 189,185,000	$ 117,743,000
Ether
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											45,287.78133655				39,445.13266916				39,359.77040671	39,445.13266916	39,359.77040671	45,287.78133655
Quantity contributed | Quantity																				0	0	77.55708625
Quantity distributed from portfolio rebalancing | Quantity																						(4,990.48482039)
Quantity contributed from portfolio rebalancing | Quantity																				(1,925.59571086)	1,087.50823575
Quantity distributed for Manager's Fee, related party | Quantity																				(941.94243493)	(1,002.1459733)	(1,015.0831957)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0	0	0
Quantity, Net realized gain (loss) on investment | Quantity																				0	0	0
Quantity, Balance end | Quantity												36,577.59452337				39,445.13266916				36,577.59452337	39,445.13266916	39,359.77040671
Balance at Fair Value											$ 101,625,000				$ 75,964,000				$ 40,136,000	$ 75,964,000	$ 40,136,000	$ 101,625,000
Fair Value, contributed																				0	0	252,000
Fair value, distributed from portfolio rebalancing																						(12,204,000)
Fair value, contributed from portfolio rebalancing																				(3,779,000)	1,095,000
Fair Value, distributed for Manager's Fee, related party																				(2,337,000)	(1,568,000)	(3,080,000)
Net change in unrealized appreciation on investments in digital assets																				50,085,000	34,695,000	(59,012,000)
Realized Investment Gains (Losses)																				5,272,000	1,606,000	12,555,000
Balance at Fair Value end												$ 125,205,000				$ 75,964,000				$ 125,205,000	$ 75,964,000	$ 40,136,000
ADA
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											0				11,194,902.551275				10,916,582.900254	11,194,902.551275	10,916,582.900254	0
Quantity contributed | Quantity																				0	0	20,953.270382
Quantity contributed from portfolio rebalancing | Quantity																				(10,984,888.769029)	559,615.581934	11,178,490.637538
Quantity distributed for Manager's Fee, related party | Quantity																				(210,013.782246)	(281,295.930913)	(282,861.007666)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0	0	0
Quantity, Net realized gain (loss) on investment | Quantity																				0	0	0
Quantity, Balance end | Quantity												0				11,194,902.551275				0	11,194,902.551275	10,916,582.900254
Balance at Fair Value											$ 0				$ 3,195,000				$ 4,803,000	$ 3,195,000	$ 4,803,000	$ 0
Fair Value, contributed																				0	0	46,000
Fair value, contributed from portfolio rebalancing																				(6,478,000)	231,000	15,389,000
Fair Value, distributed for Manager's Fee, related party																				(89,000)	(108,000)	(392,000)
Net change in unrealized appreciation on investments in digital assets																				12,051,000	(1,401,000)	(10,650,000)
Realized Investment Gains (Losses)																				(8,679,000)	(330,000)	410,000
Balance at Fair Value end												$ 0				$ 3,195,000				$ 0	$ 3,195,000	$ 4,803,000
SOL
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											0				123,915.89529091				111,216.13265694	123,915.89529091	111,216.13265694	0
Quantity contributed | Quantity																				0	0	0
Quantity contributed from portfolio rebalancing | Quantity																				14,724.90144955	15,665.43529877	113,222.94565799
Quantity distributed for Manager's Fee, related party | Quantity																				(3,292.00953097)	(2,965.6726648)	(2,006.81300105)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0	0	0
Quantity, Net realized gain (loss) on investment | Quantity																				0	0	0
Quantity, Balance end | Quantity												135,348.78720949				123,915.89529091				135,348.78720949	123,915.89529091	111,216.13265694
Balance at Fair Value											$ 0				$ 2,366,000				$ 3,557,000	$ 2,366,000	$ 3,557,000	$ 0
Fair Value, contributed																				0	0	0
Fair value, contributed from portfolio rebalancing																				1,274,000	384,000	15,869,000
Fair Value, distributed for Manager's Fee, related party																				(292,000)	(73,000)	(246,000)
Net change in unrealized appreciation on investments in digital assets																				16,330,000	(1,186,000)	(11,864,000)
Realized Investment Gains (Losses)																				(104,000)	(316,000)	(202,000)
Balance at Fair Value end												$ 19,574,000				$ 2,366,000				$ 19,574,000	$ 2,366,000	$ 3,557,000
MATIC
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity															2,926,029.61320324				0	2,926,029.61320324	0
Quantity contributed | Quantity																				0	0
Quantity contributed from portfolio rebalancing | Quantity																				(2,887,850.26244458)	2,979,195.2072644
Quantity distributed for Manager's Fee, related party | Quantity																				(38,179.35075866)	(53,165.59406116)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0	0
Quantity, Net realized gain (loss) on investment | Quantity																				0	0
Quantity, Balance end | Quantity												0				2,926,029.61320324				0	2,926,029.61320324	0
Balance at Fair Value															$ 1,922,000				$ 0	$ 1,922,000	$ 0
Fair Value, contributed																				0	0
Fair value, contributed from portfolio rebalancing																				(2,486,000)	2,524,000
Fair Value, distributed for Manager's Fee, related party																				(26,000)	(51,000)
Net change in unrealized appreciation on investments in digital assets																				565,000	(565,000)
Realized Investment Gains (Losses)																				25,000	14,000
Balance at Fair Value end												$ 0				$ 1,922,000				$ 0	$ 1,922,000	$ 0
DOT
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											0				0				328,187.49357863	0	328,187.49357863	0
Quantity contributed | Quantity																					0	0
Quantity distributed from portfolio rebalancing | Quantity																					(328,052.64509826)
Quantity contributed from portfolio rebalancing | Quantity																						330,149.03708006
Quantity distributed for Manager's Fee, related party | Quantity																					(134.84848037)	(1,961.54350143)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																					0	0
Quantity, Net realized gain (loss) on investment | Quantity																					0	0
Quantity, Balance end | Quantity																0					0	328,187.49357863
Balance at Fair Value											$ 0				$ 0				$ 2,235,000	$ 0	$ 2,235,000	$ 0
Fair Value, contributed																					0	0
Fair value, distributed from portfolio rebalancing																					(2,247,000)
Fair value, contributed from portfolio rebalancing																						7,576,000
Fair Value, distributed for Manager's Fee, related party																					(1,000)	(24,000)
Net change in unrealized appreciation on investments in digital assets																					5,103,000	(5,103,000)
Realized Investment Gains (Losses)																					(5,090,000)	(214,000)
Balance at Fair Value end																$ 0					$ 0	$ 2,235,000
AVAX
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											0				0				88,973.97836461	0	88,973.97836461	0
Quantity contributed | Quantity																				0	0	0
Quantity distributed from portfolio rebalancing | Quantity																				116,340.93500452	(87,745.50702693)
Quantity contributed from portfolio rebalancing | Quantity																						89,505.76684675
Quantity distributed for Manager's Fee, related party | Quantity																				(1,385.27021072)	(1,228.47133768)	(531.78848214)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0	0	0
Quantity, Net realized gain (loss) on investment | Quantity																				0	0	0
Quantity, Balance end | Quantity												114,955.6647938				0				114,955.6647938	0	88,973.97836461
Balance at Fair Value											$ 0				$ 0				$ 1,445,000	$ 0	$ 1,445,000	$ 0
Fair Value, contributed																				0	0	0
Fair value, distributed from portfolio rebalancing																				4,338,000	(974,000)
Fair value, contributed from portfolio rebalancing																						8,665,000
Fair Value, distributed for Manager's Fee, related party																				(53,000)	(21,000)	(23,000)
Net change in unrealized appreciation on investments in digital assets																				(1,014,000)	6,936,000	(6,936,000)
Realized Investment Gains (Losses)																				2,000	(7,386,000)	(261,000)
Balance at Fair Value end												$ 3,273,000				$ 0				$ 3,273,000	$ 0	$ 1,445,000
LTC
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											26,184.80079374				0				23,725.08718334	0	23,725.08718334	26,184.80079374
Quantity contributed | Quantity																					0	47.39510812
Quantity distributed from portfolio rebalancing | Quantity																					(23,715.33881688)	(1,901.21497737)
Quantity distributed for Manager's Fee, related party | Quantity																					(9.74836646)	(605.89374115)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																					0	0
Quantity, Net realized gain (loss) on investment | Quantity																					0	0
Quantity, Balance end | Quantity																0					0	23,725.08718334
Balance at Fair Value											$ 3,707,000				$ 0				$ 1,220,000	$ 0	$ 1,220,000	$ 3,707,000
Fair Value, contributed																					0	9,000
Fair value, distributed from portfolio rebalancing																					(1,177,000)	(281,000)
Fair Value, distributed for Manager's Fee, related party																					(1,000)	(83,000)
Net change in unrealized appreciation on investments in digital assets																					574,000	(2,315,000)
Realized Investment Gains (Losses)																					(616,000)	183,000
Balance at Fair Value end																$ 0					$ 0	$ 1,220,000
UNI
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											0				0				232,687.02308212	0	232,687.02308212	0
Quantity contributed | Quantity																					0	0
Quantity distributed from portfolio rebalancing | Quantity																					(232,591.41465073)
Quantity contributed from portfolio rebalancing | Quantity																						236,778.41720026
Quantity distributed for Manager's Fee, related party | Quantity																					(95.60843139)	(4,091.39411814)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																					0	0
Quantity, Net realized gain (loss) on investment | Quantity																					0	0
Quantity, Balance end | Quantity																0					0	232,687.02308212
Balance at Fair Value											$ 0				$ 0				$ 1,122,000	$ 0	$ 1,122,000	$ 0
Fair Value, contributed																					0	0
Fair value, distributed from portfolio rebalancing																					(1,236,000)
Fair value, contributed from portfolio rebalancing																						5,483,000
Fair Value, distributed for Manager's Fee, related party																					0	(54,000)
Net change in unrealized appreciation on investments in digital assets																					3,937,000	(3,937,000)
Realized Investment Gains (Losses)																					(3,823,000)	(370,000)
Balance at Fair Value end																$ 0					$ 0	$ 1,122,000
LINK
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											153,327.61595468				0				158,987.59087114	0	158,987.59087114	153,327.61595468
Quantity contributed | Quantity																					0	310.461329
Quantity distributed from portfolio rebalancing | Quantity																					(158,922.26469191)
Quantity contributed from portfolio rebalancing | Quantity																						9,391.16255779
Quantity distributed for Manager's Fee, related party | Quantity																					(65.32617923)	(4,041.64897033)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																					0	0
Quantity, Net realized gain (loss) on investment | Quantity																					0	0
Quantity, Balance end | Quantity																0					0	158,987.59087114
Balance at Fair Value											$ 2,956,000				$ 0				$ 960,000	$ 0	$ 960,000	$ 2,956,000
Fair Value, contributed																					0	8,000
Fair value, distributed from portfolio rebalancing																					(989,000)
Fair value, contributed from portfolio rebalancing																						143,000
Fair Value, distributed for Manager's Fee, related party																					(1,000)	(78,000)
Net change in unrealized appreciation on investments in digital assets																					3,726,000	(2,016,000)
Realized Investment Gains (Losses)																					(3,696,000)	(53,000)
Balance at Fair Value end																$ 0					$ 0	$ 960,000
BCH
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity											7,379.46217362				0				6,314.20828653	0	6,314.20828653	7,379.46217362
Quantity contributed | Quantity																					0	13.60904594
Quantity distributed from portfolio rebalancing | Quantity																					(6,311.6138507)	(906.97968581)
Quantity distributed for Manager's Fee, related party | Quantity																					(2.59443583)	(171.88324722)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																					0	0
Quantity, Net realized gain (loss) on investment | Quantity																					0	0
Quantity, Balance end | Quantity																0					0	6,314.20828653
Balance at Fair Value											$ 3,845,000				$ 0				$ 631,000	$ 0	$ 631,000	$ 3,845,000
Fair Value, contributed																					0	8,000
Fair value, distributed from portfolio rebalancing																					(660,000)	(388,000)
Fair Value, distributed for Manager's Fee, related party																					0	(74,000)
Net change in unrealized appreciation on investments in digital assets																					1,662,000	(2,830,000)
Realized Investment Gains (Losses)																					(1,633,000)	70,000
Balance at Fair Value end																$ 0					$ 0	$ 631,000
XRP
Summary Of Investment Holdings [Line Items]
Quantity, Balance | Quantity															0					0
Quantity contributed | Quantity																				0
Quantity distributed from portfolio rebalancing | Quantity																				16,922,626.498281
Quantity distributed for Manager's Fee, related party | Quantity																				(203,318.578941)
Quantity net change in unrealized (depreciation) appreciation on investment | Quantity																				0
Quantity, Net realized gain (loss) on investment | Quantity																				0
Quantity, Balance end | Quantity												16,719,307.91934				0				16,719,307.91934	0
Balance at Fair Value															$ 0					$ 0
Fair Value, contributed																				0
Fair value, distributed from portfolio rebalancing																				9,882,000
Fair Value, distributed for Manager's Fee, related party																				(111,000)
Net change in unrealized appreciation on investments in digital assets																				(1,847,000)
Realized Investment Gains (Losses)																				(7,000)
Balance at Fair Value end												$ 7,917,000				$ 0				$ 7,917,000	$ 0