Quarterly Statements of Operations - Schedule of Quarterly Statements of Operations (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Expenses: | |||||||||||
| Sponsor's Fee, related party | $ 847 | $ 1,261 | $ 1,331 | $ 1,372 | $ 959 | $ 897 | $ 1,027 | $ 782 | $ 4,811 | $ 3,665 | $ 2,469 |
| Net investment loss | (847) | (1,261) | (1,331) | (1,372) | (959) | (897) | (1,027) | (782) | (4,811) | (3,665) | (2,469) |
| Net realized and unrealized (loss) gain from: | |||||||||||
| Net realized (loss) gain on investment in BCH | (85) | 333 | 377 | 412 | 6 | (45) | 108 | (86) | 1,037 | (17) | (450) |
| Net change in unrealized appreciation/depreciation on investment in BCH | (103,541) | (49,845) | 14,778 | 15,979 | 84,506 | (52,339) | 34,484 | (18,005) | (122,629) | 48,646 | 23,205 |
| Net realized and unrealized (loss) gain on investment | (103,626) | (49,512) | 15,155 | 16,391 | 84,512 | (52,384) | 34,592 | (18,091) | (121,592) | 48,629 | $ 22,755 |
| Net (decrease) increase in net assets resulting from operations | $ (104,473) | $ (50,773) | $ 13,824 | $ 15,019 | $ 83,553 | $ (53,281) | $ 33,565 | $ (18,873) | $ (126,403) | $ 44,964 | |