Fair Value of Investments in Digital Assets - Changes in Quantity of Each Fund Component and Their Respective Fair Values (Details) | Oct. 01, 2021USD ($) | Jul. 01, 2021USD ($)Quantity | Apr. 02, 2021USD ($) | Jan. 04, 2021USD ($) | Dec. 31, 2021USD ($)Quantity | Dec. 31, 2020USD ($) | Dec. 31, 2021USD ($)Quantity | Dec. 31, 2020USD ($)Quantity | Jun. 30, 2021USD ($)Quantity |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Balance at Fair Value | | $ 367,308,000 | | | | | $ 367,308,000 | | |
Net realized gain (loss) on investment | $ 14,980,028 | $ 11,651,902 | $ 4,398,884 | $ (1,754,085) | $ 17,866,000 | $ 426,000 | 31,570,000 | $ 473,000 | |
Balance at Fair Value | | | | | $ 496,947,000 | | $ 496,947,000 | | $ 367,308,000 |
BTC | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 7,340.02142854 | | | | | 7,340.02142854 | 2,890.95335771 | 2,890.95335771 |
Quantity contributed | Quantity | | | | | | | 13.24337963 | | 4,668.87490748 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | (656.52708407) | | (49.26609880) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (86.50920502) | | (170.54073785) |
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 | | | | | 6,610.22851908 | | 6,610.22851908 | | 7,340.02142854 |
Balance at Fair Value | | $ 255,175,000 | | | | | $ 255,175,000 | $ 26,406,000 | $ 26,406,000 |
Fair Value, contributed | | | | | | | 613,000 | | 61,878,000 |
Fair value, distributed from portfolio rebalancing | | | | | | | (26,334,000) | | (4,018,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (4,214,000) | | (5,373,000) |
Net change in unrealized appreciation on investment | | | | | | | 55,804,000 | | 168,230,000 |
Net realized gain (loss) on investment | | | | | | | 22,153,000 | | 8,052,000 |
Balance at Fair Value | | | | | $ 303,197,000 | | $ 303,197,000 | | $ 255,175,000 |
ETH | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 45,287.78133655 | | | | | 45,287.78133655 | 16,713.06457809 | 16,713.06457809 |
Quantity contributed | Quantity | | | | | | | 77.55708625 | | 27,048.35623477 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | (4,191.03512819) | | 2,541.65341845 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (518.91185317) | | (1,015.29289476) |
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 | | | | | 40,655.39144144 | | 40,655.39144144 | | 45,287.78133655 |
Balance at Fair Value | | $ 101,625,000 | | | | | $ 101,625,000 | $ 3,760,000 | $ 3,760,000 |
Fair Value, contributed | | | | | | | 252,000 | | 11,956,000 |
Fair value, distributed from portfolio rebalancing | | | | | | | (9,393,000) | | 2,993,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (1,799,000) | | (1,362,000) |
Net change in unrealized appreciation on investment | | | | | | | 48,439,000 | | 83,519,000 |
Net realized gain (loss) on investment | | | | | | | 9,055,000 | | 759,000 |
Balance at Fair Value | | | | | $ 148,179,000 | | $ 148,179,000 | | $ 101,625,000 |
SOL | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 0 | | | | | 0 | | |
Quantity contributed | Quantity | | | | | | | 0 | | |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | 106,015.34887688 | | |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (665.96428436) | | |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | 0 | | |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | 0 | | |
Quantity, Balance | Quantity | | | | | 105,349.38459252 | | 105,349.38459252 | | 0 |
Balance at Fair Value | | $ 0 | | | | | $ 0 | | |
Fair Value, contributed | | | | | | | 0 | | |
Fair value, distributed from portfolio rebalancing | | | | | | | 14,914,000 | | |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (129,000) | | |
Net change in unrealized appreciation on investment | | | | | | | 3,055,000 | | |
Net realized gain (loss) on investment | | | | | | | (115,000) | | |
Balance at Fair Value | | | | | $ 17,725,000 | | $ 17,725,000 | | $ 0 |
ADA | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 0 | | | | | 0 | | |
Quantity contributed | Quantity | | | | | | | 20,953.27038208 | | |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | 11,650,299.27053844 | | |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (143,630.64526582) | | |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | 0 | | |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | 0 | | |
Quantity, Balance | Quantity | | | | | 11,527,621.89565470 | | 11,527,621.89565470 | | 0 |
Balance at Fair Value | | $ 0 | | | | | $ 0 | | |
Fair Value, contributed | | | | | | | 46,000 | | |
Fair value, distributed from portfolio rebalancing | | | | | | | 15,959,000 | | |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (269,000) | | |
Net change in unrealized appreciation on investment | | | | | | | (1,448,000) | | |
Net realized gain (loss) on investment | | | | | | | 582,000 | | |
Balance at Fair Value | | | | | $ 14,870,000 | | $ 14,870,000 | | $ 0 |
UNI | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 0 | | | | | 0 | | |
Quantity contributed | Quantity | | | | | | | 0 | | |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | 213,332.22308637 | | |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (1,340.10445446) | | |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | 0 | | |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | 0 | | |
Quantity, Balance | Quantity | | | | | 211,992.11863191 | | 211,992.11863191 | | 0 |
Balance at Fair Value | | $ 0 | | | | | $ 0 | | |
Fair Value, contributed | | | | | | | 0 | | |
Fair value, distributed from portfolio rebalancing | | | | | | | 5,212,000 | | |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (29,000) | | |
Net change in unrealized appreciation on investment | | | | | | | (1,285,000) | | |
Net realized gain (loss) on investment | | | | | | | (330,000) | | |
Balance at Fair Value | | | | | $ 3,568,000 | | $ 3,568,000 | | $ 0 |
LTC | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 26,184.80079374 | | | | | 26,184.80079374 | 9,446.46857963 | 9,446.46857963 |
Quantity contributed | Quantity | | | | | | | 47.39510812 | | 15,310.38020958 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | (2,055.23220558) | | 2,010.23222215 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (310.92157608) | | (582.28021762) |
Quantity net change in unrealized depreciation (appreciation) on investment | Quantity | | | | | | | 0 | | 0 |
Quantity, Net realized gain (loss) on investment | Quantity | | | | | | | | | 0 |
Quantity, Balance | Quantity | | | | | 23,866.04212020 | | 23,866.04212020 | | 26,184.80079374 |
Balance at Fair Value | | $ 3,707,000 | | | | | $ 3,707,000 | $ 388,000 | $ 388,000 |
Fair Value, contributed | | | | | | | 8,000 | | 908,000 |
Fair value, distributed from portfolio rebalancing | | | | | | | (300,000) | | 309,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (53,000) | | (81,000) |
Net change in unrealized appreciation on investment | | | | | | | (99,000) | | 2,142,000 |
Net realized gain (loss) on investment | | | | | | | 175,000 | | 41,000 |
Balance at Fair Value | | | | | $ 3,438,000 | | $ 3,438,000 | | $ 3,707,000 |
LINK | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 153,327.61595468 | | | | | 153,327.61595468 | 0 | 0 |
Quantity contributed | Quantity | | | | | | | 310.46132900 | | 253.44138473 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | 8,790.77944755 | | 154,021.49829970 |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (2,062.17995409) | | (947.32372975) |
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 | | | | | 160,366.67677714 | | 160,366.67677714 | | 153,327.61595468 |
Balance at Fair Value | | $ 2,956,000 | | | | | $ 2,956,000 | $ 0 | $ 0 |
Fair Value, contributed | | | | | | | 8,000 | | 9,000 |
Fair value, distributed from portfolio rebalancing | | | | | | | 133,000 | | 4,622,000 |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (51,000) | | (30,000) |
Net change in unrealized appreciation on investment | | | | | | | 33,000 | | (1,709,000) |
Net realized gain (loss) on investment | | | | | | | (21,000) | | 64,000 |
Balance at Fair Value | | | | | $ 3,058,000 | | $ 3,058,000 | | $ 2,956,000 |
BCH | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 7,379.46217362 | | | | | 7,379.46217362 | 2,908.94301800 | 2,908.94301800 |
Quantity contributed | Quantity | | | | | | | 13.60904594 | | 4,696.88194985 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | (381.01746501) | | (55.03257309) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | (89.71704262) | | (171.33022114) |
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 | | | | | 6,922.33671193 | | 6,922.33671193 | | 7,379.46217362 |
Balance at Fair Value | | $ 3,845,000 | | | | | $ 3,845,000 | $ 643,000 | $ 643,000 |
Fair Value, contributed | | | | | | | 8,000 | | 1,185,000 |
Fair value, distributed from portfolio rebalancing | | | | | | | (191,000) | | (31,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | (50,000) | | (81,000) |
Net change in unrealized appreciation on investment | | | | | | | (771,000) | | 2,102,000 |
Net realized gain (loss) on investment | | | | | | | 71,000 | | 27,000 |
Balance at Fair Value | | | | | $ 2,912,000 | | $ 2,912,000 | | $ 3,845,000 |
XRP | | | | | | | | | |
Summary Of Investment Holdings [Line Items] | | | | | | | | | |
Quantity, Balance | Quantity | | 0 | | | | | 0 | 6,697,006.68459600 | 6,697,006.68459600 |
Quantity contributed | Quantity | | | | | | | | | 10,327,653.14534000 |
Quantity distributed from portfolio rebalancing | Quantity | | | | | | | | | (16,838,197.64668600) |
Quantity distributed for Manager's Fee, related party | Quantity | | | | | | | | | (186,462.18325000) |
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 | | | | | $ 0 | $ 1,177,000 | $ 1,177,000 |
Fair Value, contributed | | | | | | | | | 2,668,000 |
Fair value, distributed from portfolio rebalancing | | | | | | | | | (3,875,000) |
Fair Value, distributed for Manager's Fee, related party | | | | | | | | | (60,000) |
Net change in unrealized appreciation on investment | | | | | | | | | 1,740,000 |
Net realized gain (loss) on investment | | | | | | | | | (1,650,000) |
Balance at Fair Value | | | | | | | | | $ 0 |