Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Statement Of Financial Position [Abstract]
Cost of investment in Bitcoin Cash, at fair value	$ 118,079	$ 108,432

Cost of the investment.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

Name:	us-gaap_InvestmentOwnedAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant