75000 - Document - Cover Page link:presentationLink link:calculationLink link:definitionLink 75010 - Statement - STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75020 - Statement - STATEMENTS OF ASSETS AND LIABILITIES (Parenthetical) (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75030 - Statement - SCHEDULES OF INVESTMENT (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75040 - Statement - SCHEDULES OF INVESTMENT (Parenthetical) (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75050 - Statement - STATEMENTS OF OPERATIONS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75060 - Statement - STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED) link:presentationLink link:calculationLink link:definitionLink 75070 - Statement - STATEMENTS OF CHANGES IN NET ASSETS (UNAUDITED) (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 995455 - Disclosure - Organization link:presentationLink link:calculationLink link:definitionLink 995465 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 995475 - Disclosure - Fair Value of Bitcoin link:presentationLink link:calculationLink link:definitionLink 995485 - Disclosure - The Initial Distribution from the Grayscale Bitcoin Trust ETF link:presentationLink link:calculationLink link:definitionLink 995495 - Disclosure - Creations and Redemptions of Shares link:presentationLink link:calculationLink link:definitionLink 995505 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 995515 - Disclosure - Related Parties link:presentationLink link:calculationLink link:definitionLink 995525 - Disclosure - Concentration Risk link:presentationLink link:calculationLink link:definitionLink 995535 - Disclosure - Commitments and Contingent Liabilities link:presentationLink link:calculationLink link:definitionLink 995545 - Disclosure - Financial Highlights Per Share Performance link:presentationLink link:calculationLink link:definitionLink 995555 - Disclosure - Indemnifications link:presentationLink link:calculationLink link:definitionLink 995565 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 995575 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 995585 - Disclosure - Summary of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 995595 - Disclosure - Fair Value of Bitcoin (Tables) link:presentationLink link:calculationLink link:definitionLink 995605 - Disclosure - Creations and Redemptions of Shares (Tables) link:presentationLink link:calculationLink link:definitionLink 995615 - Disclosure - Financial Highlights Per Share Performance (Tables) link:presentationLink link:calculationLink link:definitionLink 995625 - Disclosure - Organization - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995635 - Disclosure - Summary of Significant Accounting Policies - Schedule of Financial Assets at Fair value (Details) link:presentationLink link:calculationLink link:definitionLink 995645 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995655 - Disclosure - Fair Value of Bitcoin - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995665 - Disclosure - Fair Value of Bitcoin - Summary of Changes in Quantity of Bitcoin and the Respective Fair Value (Detail) link:presentationLink link:calculationLink link:definitionLink 995675 - Disclosure - Fair Value of Bitcoin - Summary of Changes in Quantity of Bitcoin and the Respective Fair Value (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 995685 - Disclosure - The Initial Distribution from the Grayscale Bitcoin Trust ETF - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995695 - Disclosure - Creations and Redemptions of Shares - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995705 - Disclosure - Creations and Redemptions of Shares - Schedule of Activity in Number of Shares Issued and Redeemed (Details) link:presentationLink link:calculationLink link:definitionLink 995715 - Disclosure - Creations and Redemptions of Shares - Schedule of Activity in Value of Shares Issued and Redeemed (Details) link:presentationLink link:calculationLink link:definitionLink 995725 - Disclosure - Creations and Redemptions of Shares - Schedule of Activity in Value of Shares Issued and Redeemed (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 995735 - Disclosure - Creations and Redemptions of Shares - Investment Owned Balanced Contract Receivable (Details) link:presentationLink link:calculationLink link:definitionLink 995745 - Disclosure - Creations and Redemptions of Shares - Investment Owned Balanced Contract Payable (Details) link:presentationLink link:calculationLink link:definitionLink 995755 - Disclosure - Income Taxes - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995765 - Disclosure - Related Parties - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 995775 - Disclosure - Financial Highlights Per Share Performance - Summary of Per Share Data (Details) link:presentationLink link:calculationLink link:definitionLink 995785 - Disclosure - Financial Highlights Per Share Performance - Summary of Per Share Data (Parenthetical) (Details) link:presentationLink link:calculationLink link:definitionLink 995795 - Disclosure - Subsequent Events - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink Investment in Bitcoin [Member] Investment In Bitcoin [Member] Investment in bitcoin Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Investment [Member] Investment. Equity [Abstract] Entity Current Reporting Status Entity Current Reporting Status Accrued and unpaid sponsors fees Accrued and Unpaid Sponsors Fees Accrued and unpaid sponsors fees Operating Expenses [Abstract] Expenses: Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Commitments and Contingent Liabilities Commitments and Contingencies Disclosure [Text Block] Summary of per share data Investment Company, Financial Highlights [Table Text Block] Product and Service [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Entity Shell Company Entity Shell Company Segment Reporting, Policy [Policy Text Block] Segment Reporting Net Assets End of period Beginning of period Net Assets Bitcoin receivable Investment Owned Balanced Contract Receivable Investment owned balanced contract receivable. Statement [Table] Investment Company, Investment Income (Loss) from Operations, Per Share Net decrease in net assets resulting from operations Statement [Line Items] Entity Filer Category Entity Filer Category Investment Owned, Balance, Contracts Investment Owned, Beginning balance Investment Owned, Ending balance Increase Decrease In Net Assets. Increase Decrease In Net Assets Net decrease in net assets resulting from capital share transactions Total decrease in net assets from operations and capital share transactions Indemnifications Indemnifications [Policy Text Block] Indemnifications. Realized investment gains losses sold to pay expenses. Realized Investment Gains Losses Sold to Pay Expenses Net realized gain on investment in Bitcoin sold to pay expenses Net realized (loss) gain on investment in Bitcoin sold to pay expenses Federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event [Line Items] Subsequent Event [Line Items] Investment Owned Balance Contracts Realized investment gains losses sold to pay expenses Investment owned, balance, contracts realized investment gains (losses) sold to pay expenses. Net realized gain on investment in Bitcoin sold to pay expenses Related Party Related Party [Member] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Initial distribution ratio. Initial Distribution Ratio Initial distribution ratio Concentration Risk Disclosure [Text Block] Concentration Risk Realized investment gains losses sold for redemption of shares. Realized Investment Gains Losses Sold for Redemption of Shares Net realized gain on investment in Bitcoin sold for redemption of Shares Net realized (loss) gain on investment in Bitcoin sold for redemption of Shares Investment Owned Balance Contracts Realized Investment Gains Losses Sold for Redemption of Shares Investment owned, balance, contracts realized investment gains (losses) sold for redemption of shares. Net realized gain on investment in Bitcoin sold for redemption of Shares Investment Company, Total Return Total return Dividends Payable, Date of Record Issued date Record date Initial Distribution. Initial Distribution [TextBlock] The Initial Distribution from the Grayscale Bitcoin Trust ETF Entity Small Business Entity Small Business Net Realized And Unrealized Gain Loss [Abstract] Net Realized And Unrealized Gain Loss Net realized and unrealized loss from: Organization, Consolidation and Presentation of Financial Statements [Abstract] Amendment Flag Amendment Flag Product and Service [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Common Stock Common Stock [Member] Entity Address, Address Line One Entity Address, Address Line One Fair Value Hierarchy and NAV [Axis] Income Taxes Income Tax, Policy [Policy Text Block] Investment Company, Investment Income (Loss) from Operations, Per Share [Abstract] Net decrease in net assets from investment operations: Bitcoin distributed for Sponsor's Fee, related party Bitcoin distributed for Sponsor's Fee, related party Investment Owned Balance Contracts Distributed Investment owned, balance, contracts distributed. Document Type Document Type Net increase in Shares Stock Issued During Period, Shares, Period Increase (Decrease) Net decrease in Shares Net Change in Number of Shares Issued and Redeemed Net increase in Shares Entity Central Index Key Entity Central Index Key Subsequent Event Type [Domain] Subsequent Event Type Operating Costs and Expenses, Total Operating Costs and Expenses Sponsor's Fees incurred Liabilities [Abstract] Liabilities: Ownership [Domain] Ownership Current Fiscal Year End Date Current Fiscal Year End Date Document Quarterly Report Fair Value, by Balance Sheet Grouping [Table] Entity Address, State or Province Entity Address, State or Province Net investment loss Investment Company, Investment Income (Loss) Ratio Risks and Uncertainties [Abstract] Concentration Risk Subsequent Event [Member] Subsequent Events [Member] Indemnifications Disclosure [Abstract] Indemnifications Disclosure [Abstract]. Investment Owned Balance Contracts Net Change In Unrealized Appreciation Depreciation On Investment Investment owned, balance, contracts net change in unrealized appreciation (depreciation) on investment. Net change in unrealized appreciation on investment in Bitcoin BTC trust. BTC Trust [Member] BTC Trust [Member] Sponsor's Fee, related party Sponsor Fees Sponsors fee payable Sponsor's Parent [Member]. Sponsor Parent [Member] Sponsor's Parent [Member] Initial distrubition, description Initial Distrubition Description Initial distrubition, description. Minimum [Member] Minimum Financial Instrument [Axis] Investment owned balance contracts contributed from initial distribution. Investment Owned Balance Contracts Contributed From Initial Distribution Bitcoin contributed from Initial Distribution Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Investment Company, Gain (Loss) on Investment, Per Share Net realized and unrealized loss Shares Issued Not Disclosed Shares issued not disclosed. Unrealized Gain (Loss) on Investments Net change in unrealized (appreciation) depreciation on investment in Bitcoin Net change in unrealized appreciation/depreciation on investment in Bitcoin Net change in unrealized appreciation/depreciation on investment in Bitcoin Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Financial Assets at Fair value Related Party Transactions [Abstract] Common Stock, Other Shares, Outstanding Shares issued and outstanding, no par value (unlimited Shares authorized) Shares, Outstanding Shares outstanding at end of period Shares outstanding at beginning of period Reverse share split Stockholders' Equity, Reverse Stock Split Share represented as bitcoin Common Share Equivalent Of Bitcoin Common share equivalent of bitcoin. Segment Reporting, Expense Information Used by CODM, Description Trust announcement date Trust announcement date. Trust Announcement Date Subsequent Events [Text Block] Subsequent Events Related Party Transactions Disclosure [Text Block] Related Parties Cash Cash Entity Address, Address Line Two Entity Address, Address Line Two Fair Value Disclosures [Text Block] Fair Value of Bitcoin Dividends Payable, Date Declared Declared date Investment Owned, Fair Value Investment Owned, Ending Balance Fair Value Investment Owned, Beginning balance Investment in Bitcoin, at fair value (cost $4,132,180 and $3,916,367 as of March 31,2026 and December 31, 2025, respectively) Increase in Net Assets From Capital Share Transactions. Increase In Net Assets From Capital Share Transactions [Abstract] Increase in net assets from capital share transactions: Quantity of Bitcoin Quantity Of Bitcoin Quantity of bitcoin. Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Shares Issuance Description Shares issuance description. Issuance of shares, description Schedule of activity in number of shares issued and redeemed Schedule Of Activity In Number Of Shares Issued And Redeemed [Table Text Block] Schedule of activity in number of shares issued and redeemed table text block. Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Entity [Domain] Schedule of Investments [Line Items] Related Party [Axis] Related Party Entity Address, City or Town Entity Address, City or Town Investment, Issuer Affiliation [Domain] Security Exchange Name Amount of bitcoin distributed by the trust. Amount of Bitcoin Distributed By The Trust Amount of bitcoin distributed by the trust Initial Distribution, Amount of bitcoin distributed by the trust Investment Owned, at Cost Cost Investment owned balance shares held by custodian Investment Owned Balance Shares Held By Custodian Investment owned, balance, shares held by custodian. Previously announced shares distributed Previously Announced Shares Distributed Previously announced shares distributed Shares issued from Initial Distribution Stock Issued During Period, Shares, Initial Distribution Stock Issued During Period, Shares, Initial Distribution Exchange for stock issuance Statistical Measurement [Domain] Investment owned balanced contract payable Investment Owned Balanced Contract Payable [Table Text Block] Investment owned balanced contract payable table text block. Document Period End Date Document Period End Date Fair Value Hierarchy and NAV [Domain] Shares redeemed, Value Stock Redeemed or Called During Period, Value Shares redeemed Investment, Issuer Affiliation [Axis] Statement of Financial Position [Abstract] Related Party Transaction, Rate Related party sponsor fee percentage Bitcoin fair value per share Bitcoin Fair Value Per Share Bitcoin fair value per share Total liabilities Liabilities Total liabilities Financial Instruments [Domain] Federal Income Taxes Federal Income Taxes Policy [Policy Text Block] Federal income taxes. Coinbase Inc. [Member]. Coinbase Inc [Member] Coinbase Inc [Member] Entity File Number Entity File Number Cover [Abstract] Dividend Distribution [Member] O 2024 M2 Dividends [Member] O 2024 M2 Dividends [Member] (Decrease) increase in net assets from operations. Decrease Increase In Net Assets From Operations [Abstract] Decrease in net assets from operations: Bitcoin payable Investment Owned Balanced Contract Payable Investment owned balanced contract payable. Number of Operating Segments Number of operating segments Subsequent Event [Table] Subsequent Event [Table] Distribution Made to Limited Liability Company (LLC) Member [Line Items] Net assets. Net Assets [Abstract] Net assets: Schedule of Investments [Table] New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Pronouncements Stock Issued During Period, Value, Initial Distribution Stock Issued During Period, Value, Initial Distribution Shares issued from Initial Distribution Ownership [Axis] Ownership Number of Authorized Shares Not Disclosed Number of authorized shares not disclosed. Investment, Type [Extensible Enumeration] Investment Holdings, Schedule of Investments [Table Text Block] Summary of Changes in Quantity of Bitcoin and the Respective Fair Value Dividends [Domain] Document Transition Report Document Transition Report Schedule of Investments [Abstract] Stock Issued During Period, Value, New Issues Shares issued Value of shares issued Shares issued Assets, Fair Value Disclosure [Abstract] Assets Equity [Text Block] Creations and Redemptions of Shares Bitcoin redeemed Bitcoin redeemed Investments Owned Redemption Investments owned redemption. Net decrease in net assets resulting from operations Net Assets From Operations Increase Decrease Net assets from operations increase decrease. Net decrease in net assets resulting from operations Bitcoin contributed Investments Owned New Contributions Investments owned new contributions. Assets [Abstract] Assets: Document Fiscal Year Focus Document Fiscal Year Focus Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurement Grayscale Securities, Seed Capital Investor Grayscale Securities, Seed Capital Investor [Member] Grayscale Securities, Seed Capital Investor. Fair Value Disclosures [Abstract] Commitments and Contingencies Disclosure [Abstract] % of Net Assets Investment Owned, Net Assets, Percentage Assets, Fair Value Disclosure, Total Assets, Fair Value Disclosure Investment in Bitcoin Title of 12(b) Security Investment Income, Net Net investment loss Net investment loss Related Party [Domain] Related Party Income Taxes Income Tax Disclosure [Text Block] Shares redeemed Stock Redeemed or Called During Period, Shares Shares redeemed Legal Entity [Axis] Income Tax Disclosure [Abstract] Fair Value, Recurring and Nonrecurring [Table] Change in shares outstanding. Change In Shares Outstanding [Abstract] Change in Shares outstanding: Trading Symbol Schedule of Related Party Transactions, by Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Investment Transactions and Revenue Recognition Investment transactions and revenue recognition. Investment Transactions and Revenue Recognition [Policy Text Block] Subsequent Event Type [Axis] Subsequent Event Type Value of bitcoin distributed by trust. Value of Bitcoin Distributed By Trust Initial Distribution, Value of bitcoin distributed by the trust Value of bitcoin distributed by the trust Investment Company, Financial Highlights [Abstract] Entity Ex Transition Period Equity Components [Axis] N/A Initial distribution [Abstract] Accounts Payable, Total Accounts Payable Sponsor's Fee payable, related party Equity Component [Domain] Financial Highlights Per Share Performance Investment Company, Financial Highlights [Text Block] Investment Company, Investment Income (Loss), Per Share, Basic Net investment loss Net investment loss price per share Investment income: Investment Income, Net [Abstract] Statistical Measurement [Axis] Investment owned balanced contract receivable Investment Owned Balanced Contract Receivable [Table Text Block] Investment owned balanced contract receivable table text block. Indemnifications Indemnifications Disclosure [Text Block] Indemnifications Disclosure [Text Block]. Dividends [Axis] Amounts due to or from the related parties Related party maximum transaction in a fiscal year Related Party Transaction, Amounts of Transaction Investment Company, Financial Ratios [Abstract] Ratios to average net assets: Distributions Made to Limited Liability Company (LLC) Member [Table] Investment Company, Expense Ratio, after Fee Waiver and Incentive Fee Deduction Expenses Percentage of bitcoin distributed by the trust. Percentage of Bitcoin Distributed By The Trust Percentage of bitcoin distributed by the trust Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Entity Registrant Name Entity Registrant Name Bitcoin redeemed Bitcoin redeemed Investment Owned Balance Contracts Redemption Investment owned balance contracts redemption. Common Stock, Shares Held in Employee Trust, Shares Shares of the Trust, held by related parties Subsequent Events [Abstract] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Stockholders' Equity, Period Increase (Decrease) Net (decrease) in net assets resulting from capital share transactions Net increase in net assets resulting from capital share transactions Additional trust expenses paid by sponsor Additional Trust Expenses Paid By Sponsor Additional trust expenses paid by sponsor. Gain (Loss) on Investments Net realized and unrealized loss on investment Business closing date Business Closing Date Business closing date. Net Asset Value Per Share Exchange price per share Principal Market NAV, beginning of period Principal Market NAV, end of period Principal Market NAV per Share Investment Company, Financial Highlights [Line Items] Bitcoin distributed for Sponsor's Fee, related party Bitcoin distributed for Sponsor's Fee, related party Investments Owned Distributions Investments owned distributions. Assets Total assets Income Statement [Abstract] Sponsor [Member] Sponsor [Member]. Sponsor [Member] Basket Basket [Member] Basket. Stock Issued During Period, Shares, New Issues Shares issued Number of new stock issued during the period City Area Code City Area Code Effective date Effective date. Effective Date Schedule of activity in value of shares issued and redeemed Schedule Of Activity In Value Of Shares Issued And Redeemed [Table Text Block] Schedule of activity in value of shares issued and redeemed table text block. Bitcoin contributed Investment Owned Balance Contracts New Contributions Investment Owned, Balance, Contracts New Contributions. Investment Company, Financial Highlights [Roll Forward] Stockholders' Equity Note, Stock Split, Conversion Ratio Reverse stock split, conversion ratio Calculation of net asset value. Calculation of Net Asset Value Calculation Of Net Asset Value [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Investments owned contributed from initial distribution. Investments Owned Contributed From Initial Distribution Bitcoin contributed from Initial Distribution Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Class of Stock [Line Items] Principal market and fair value determination. Principal Market and Fair Value Determination [Policy Text Block] Principal Market and Fair Value Determination Entity Interactive Data Current Entity Interactive Data Current Investment income Investment Income Investment Income. Investment Company, Financial Highlights [Table] Entity Tax Identification Number Entity Tax Identification Number Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization Local Phone Number Local Phone Number Accounting Policies [Abstract] Stock, Class of Stock [Table] Entity Emerging Growth Company Entity Emerging Growth Company Chief Executive Officer and Chief Financial Officer [Member] Chief Executive Officer and Chief Financial Officer.