Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Increase (decrease) in net assets from operations:
Net investment loss	$ (1,109)	$ (330)	$ (2,235)	$ (480)
Net realized gain (loss) on investment in Bitcoin Cash	363	(355)	758	(440)	$ 621
Net change in unrealized (depreciation) appreciation on investment in Bitcoin Cash	(24,547)	24,357	(32,078)	17,574	59,541
Net (decrease) increase in net assets resulting from operations	(25,293)	23,672	(33,555)	16,654
Increase in net assets from capital share transactions:
Shares issued	0	20,112	11,124	59,520
Net increase in net assets resulting from capital share transactions	0	20,112	11,124	59,520
Total (decrease) increase in net assets from operations and capital share transactions	(25,293)	43,784	(22,431)	76,174
Net assets:
Beginning of period	158,328	38,075	155,466	5,685	5,685
End of period	$ 133,035	$ 81,859	$ 133,035	$ 81,859	$ 155,466
Change in Shares outstanding:
Shares outstanding at beginning of period	34,812,900	18,004,700	32,434,700	2,725,300	2,725,300
Shares issued	0	7,692,300	2,378,200	22,971,700
Net increase in Shares	0	7,692,300	2,378,200	22,971,700
Shares outstanding at end of period	34,812,900	25,697,000	34,812,900	25,697,000	32,434,700