| Activity in Bitcoin [Table Text Block] |
| Three Months Ended March 31, 2025 | | Quantity | | | Cost | | | Fair Value | | | Realized
Gain (Loss) | |
| Beginning balance | | | 551,918 | | | $ | 37,372,942,571 | | | $ | 51,530,013,513 | | | $ | — | |
| Bitcoin purchased | | | 57,098 | | | | 5,613,392,900 | | | | 5,613,392,900 | | | | — | |
| Bitcoin sold for the redemption of shares | | | (32,628 | ) | | | (2,275,391,751 | ) | | | (2,899,791,039 | ) | | | 624,399,288 | |
| Bitcoin sold to pay expenses | | | (350 | ) | | | (24,368,414 | ) | | | (32,808,972 | ) | | | 8,440,558 | |
| Net realized gain | | | — | | | | — | | | | 632,839,846 | | | | — | |
| Net change in unrealized appreciation/depreciation | | | — | | | | — | | | | (7,057,849,155 | ) | | | — | |
| Ending balance | | | 576,038 | | | $ | 40,686,575,306 | | | $ | 47,785,797,093 | | | $ | 632,839,846 | |
| Three Months Ended March 31, 2024 | | Quantity | | | Cost | | | Fair Value | | | Realized
Gain (Loss) | |
| Beginning balance | | | — | | | $ | — | | | $ | — | | | $ | — | |
| Bitcoin purchased | | | 252,016 | | | | 13,984,757,957 | | | | 13,984,757,957 | | | | — | |
| Bitcoin sold for the redemption of shares | | | — | | | | — | | | | — | | | | — | |
| Bitcoin sold to pay expenses | | | (5 | ) | | | (257,005 | ) | | | (357,530 | ) | | | 100,525 | |
| Net realized gain | | | — | | | | — | | | | 100,525 | | | | — | |
| Net change in unrealized appreciation/depreciation | | | — | | | | — | | | | 3,806,745,993 | | | | — | |
| Ending balance | | | 252,011 | | | $ | 13,984,500,952 | | | $ | 17,791,246,945 | | | $ | 100,525 | |
|