XML 37 R28.htm IDEA: XBRL DOCUMENT
v3.25.1

Financial Highlights - Summary of Financial Highlights of NAV per Share (Parenthetical) (Detail) | 3 Months Ended
--- | ---
Mar. 31, 2024
Investment Company, Financial Highlights [Abstract] |
Net asset value total return percentage | 183.36%
Market rate of return | 183.92%

X
- Definition Investment company, market rate of return since inception. + References No definition available. + Details
Name: | btco_InvestmentCompanyMarketRateOfReturnSinceInception
Namespace Prefix: | btco_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentCompanyFinancialHighlightsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rate since inception resulting in zero net present value of cash flows from investment. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 205 -Name Accounting Standards Codification -Section 50 -Paragraph 23 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478494/946-205-50-23 + Details
Name: | us-gaap_InvestmentCompanyInternalRateOfReturnSinceInception
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration