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 |
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 ($) | Jul. 01, 2021 USD ($) | Apr. 02, 2021 USD ($) | Sep. 30, 2023 USD ($) Quantity | Sep. 30, 2022 USD ($) Quantity | Jun. 30, 2023 USD ($) Quantity |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Balance at Fair Value | | | | | | | | | | $ 272,632,000 | | |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | (32,520,000) | $ 31,065,000 | |
Net realized gain (loss) on investment | $ 906,943 | $ 227,762 | $ 7,304,129 | $ 1,133,040 | $ 14,895,069 | $ 12,437,503 | $ 14,980,028 | $ 11,651,902 | $ 4,398,884 | 1,701,000 | $ (14,421,000) | |
Balance at Fair Value | | | | | | | | | | $ 240,229,000 | | $ 272,632,000 |
BTC | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 6,230.97866186 | 6,231.4365404 | 6,231.4365404 |
Quantity contributed | Quantity | | | | | | | | | | 0 | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | | | 157.11106568 |
Quantity contributed from portfolio rebalancing | Quantity | | | | | | | | | | 34.54527749 | | |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | (39.34683622) | | (157.56894422) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | 6,226.17710313 | | 6,230.97866186 |
Balance at Fair Value | | | | | | | | | | $ 189,185,000 | $ 117,743,000 | $ 117,743,000 |
Fair Value, contributed | | | | | | | | | | 0 | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | | | 3,049,000 |
Fair value, contributed from portfolio rebalancing | | | | | | | | | | 1,054,000 | | |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | (1,105,000) | | (3,549,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | (21,477,000) | | 69,386,000 |
Net realized gain (loss) on investment | | | | | | | | | | 640,000 | | 2,556,000 |
Balance at Fair Value | | | | | | | | | | $ 168,297,000 | | $ 189,185,000 |
ETH | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 39,445.13266916 | 39,359.77040671 | 39,359.77040671 |
Quantity contributed | Quantity | | | | | | | | | | 0 | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | (645.45710183) | | |
Quantity contributed from portfolio rebalancing | Quantity | | | | | | | | | | | | 1,087.50823575 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | (243.95043161) | | (1,002.1459733) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | 38,555.72513572 | | 39,445.13266916 |
Balance at Fair Value | | | | | | | | | | $ 75,964,000 | $ 40,136,000 | $ 40,136,000 |
Fair Value, contributed | | | | | | | | | | 0 | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | (1,229,000) | | |
Fair value, contributed from portfolio rebalancing | | | | | | | | | | | | 1,095,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | (429,000) | | (1,568,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | (10,779,000) | | 34,695,000 |
Net realized gain (loss) on investment | | | | | | | | | | 1,227,000 | | 1,606,000 |
Balance at Fair Value | | | | | | | | | | $ 64,754,000 | | $ 75,964,000 |
ADA | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 11,194,902.551275 | 10,916,582.900254 | 10,916,582.900254 |
Quantity contributed | Quantity | | | | | | | | | | 0 | | 0 |
Quantity contributed from portfolio rebalancing | Quantity | | | | | | | | | | 81,945.38 | | 559,615.581934 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | (70,810.698296) | | (281,295.930913) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | 11,206,037.232979 | | 11,194,902.551275 |
Balance at Fair Value | | | | | | | | | | $ 3,195,000 | $ 4,803,000 | $ 4,803,000 |
Fair Value, contributed | | | | | | | | | | 0 | | 0 |
Fair value, contributed from portfolio rebalancing | | | | | | | | | | 24,000 | | 231,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | (21,000) | | (108,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | (276,000) | | (1,401,000) |
Net realized gain (loss) on investment | | | | | | | | | | (76,000) | | (330,000) |
Balance at Fair Value | | | | | | | | | | $ 2,846,000 | | $ 3,195,000 |
MATIC | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 2,926,029.61320324 | 0 | 0 |
Quantity contributed | Quantity | | | | | | | | | | 0 | | 0 |
Quantity contributed from portfolio rebalancing | Quantity | | | | | | | | | | 80,972.91 | | 2,979,195.2072644 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | (18,861.74330871) | | (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 | Quantity | | | | | | | | | | 2,988,140.77989453 | | 2,926,029.61320324 |
Balance at Fair Value | | | | | | | | | | $ 1,922,000 | $ 0 | $ 0 |
Fair Value, contributed | | | | | | | | | | 0 | | 0 |
Fair value, contributed from portfolio rebalancing | | | | | | | | | | 54,000 | | 2,524,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | (12,000) | | (51,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | (369,000) | | (565,000) |
Net realized gain (loss) on investment | | | | | | | | | | (5,000) | | 14,000 |
Balance at Fair Value | | | | | | | | | | $ 1,590,000 | | $ 1,922,000 |
SOL | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 123,915.89529091 | 111,216.13265694 | 111,216.13265694 |
Quantity contributed | Quantity | | | | | | | | | | 0 | | 0 |
Quantity contributed from portfolio rebalancing | Quantity | | | | | | | | | | 4,934.25 | | 15,665.43529877 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | (807.72773467) | | (2,965.6726648) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | 0 | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | 128,042.41755624 | | 123,915.89529091 |
Balance at Fair Value | | | | | | | | | | $ 2,366,000 | $ 3,557,000 | $ 3,557,000 |
Fair Value, contributed | | | | | | | | | | 0 | | 0 |
Fair value, contributed from portfolio rebalancing | | | | | | | | | | 97,000 | | 384,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | (17,000) | | (73,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | (381,000) | | (1,186,000) |
Net realized gain (loss) on investment | | | | | | | | | | (85,000) | | (316,000) |
Balance at Fair Value | | | | | | | | | | $ 2,742,000 | | $ 2,366,000 |
DOT | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 0 | 328,187.49357863 | 328,187.49357863 |
Quantity contributed | Quantity | | | | | | | | | | | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | | | (328,052.64509826) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | | | (134.84848037) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | | | 0 |
Balance at Fair Value | | | | | | | | | | $ 0 | $ 2,235,000 | $ 2,235,000 |
Fair Value, contributed | | | | | | | | | | | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | | | (2,247,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | | | (1,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | | | 5,103,000 |
Net realized gain (loss) on investment | | | | | | | | | | | | (5,090,000) |
Balance at Fair Value | | | | | | | | | | | | $ 0 |
LTC | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 0 | 23,725.08718334 | 23,725.08718334 |
Quantity contributed | Quantity | | | | | | | | | | | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | | | (23,715.33881688) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | | | (9.74836646) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | | | 0 |
Balance at Fair Value | | | | | | | | | | $ 0 | $ 1,220,000 | $ 1,220,000 |
Fair Value, contributed | | | | | | | | | | | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | | | (1,177,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | | | (1,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | | | 574,000 |
Net realized gain (loss) on investment | | | | | | | | | | | | (616,000) |
Balance at Fair Value | | | | | | | | | | | | $ 0 |
UNI | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 0 | 232,687.02308212 | 232,687.02308212 |
Quantity contributed | Quantity | | | | | | | | | | | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | | | (232,591.41465073) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | | | (95.60843139) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | | | 0 |
Balance at Fair Value | | | | | | | | | | $ 0 | $ 1,122,000 | $ 1,122,000 |
Fair Value, contributed | | | | | | | | | | | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | | | (1,236,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | | | 0 |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | | | 3,937,000 |
Net realized gain (loss) on investment | | | | | | | | | | | | (3,823,000) |
Balance at Fair Value | | | | | | | | | | | | $ 0 |
LINK | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 0 | 158,987.59087114 | 158,987.59087114 |
Quantity contributed | Quantity | | | | | | | | | | | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | | | (158,922.26469191) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | | | (65.32617923) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | | | 0 |
Balance at Fair Value | | | | | | | | | | $ 0 | $ 960,000 | $ 960,000 |
Fair Value, contributed | | | | | | | | | | | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | | | (989,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | | | (1,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | | | 3,726,000 |
Net realized gain (loss) on investment | | | | | | | | | | | | (3,696,000) |
Balance at Fair Value | | | | | | | | | | | | $ 0 |
BCH | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 0 | 6,314.20828653 | 6,314.20828653 |
Quantity contributed | Quantity | | | | | | | | | | | | 0 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | | | | (6,311.6138507) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | | | (2.59443583) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | | | 0 |
Balance at Fair Value | | | | | | | | | | $ 0 | $ 631,000 | $ 631,000 |
Fair Value, contributed | | | | | | | | | | | | 0 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | | | | (660,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | | | 0 |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | | | 1,662,000 |
Net realized gain (loss) on investment | | | | | | | | | | | | (1,633,000) |
Balance at Fair Value | | | | | | | | | | | | $ 0 |
AVAX | | | | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | | | | |
Quantity, Balance | Quantity | | | | | | | | | | 0 | 88,973.97836461 | 88,973.97836461 |
Quantity contributed | Quantity | | | | | | | | | | | | 0 |
Quantity contributed from portfolio rebalancing | Quantity | | | | | | | | | | | | (87,745.50702693) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | | | | (1,228.47133768) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | | | | | | | | 0 |
Balance at Fair Value | | | | | | | | | | $ 0 | $ 1,445,000 | $ 1,445,000 |
Fair Value, contributed | | | | | | | | | | | | 0 |
Fair value, contributed from portfolio rebalancing | | | | | | | | | | | | (974,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | | | | (21,000) |
Net change in unrealized (depreciation) appreciation on investments in digital assets | | | | | | | | | | | | 6,936,000 |
Net realized gain (loss) on investment | | | | | | | | | | | | (7,386,000) |
Balance at Fair Value | | | | | | | | | | | | $ 0 |