v3.25.2
COMBINED STATEMENTS OF CASH FLOWS - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Mar. 31, 2025
Cash Flows from Operating Activities:    
Net increase (decrease) in net assets resulting from operations $ 61,220,174 [1] $ 109,151,572
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:    
Purchases of bitcoin (278,015,474) [1] (308,427,127)
Sales of bitcoin 0 [1] 349,041,710
Net realized (gain) loss on investment in bitcoin 0 [1] (73,974,049)
Net change in unrealized (appreciation) depreciation on investment in bitcoin (61,220,195) [1] (35,898,082)
Change in operating assets and liabilities:    
Sponsor's fee payable 21 [1] 301,310
Net cash provided by (used in) operating activities (278,015,474) [1] 40,195,334
Cash Flows from Financing Activities    
Proceeds from issuance of Shares 278,015,474 [1] 308,427,127
Payments on Shares redeemed 0 [1] (348,622,461)
Net cash provided by (used in) financing activities 278,015,474 [1] (40,195,334)
Cash    
Net increase in cash 0 [1] 0
Cash, beginning of period [1] 0 0
Cash, end of year 0 [1] 0
Franklin Bitcoin ETF [Member]    
Cash Flows from Operating Activities:    
Net increase (decrease) in net assets resulting from operations 61,220,174 [1] 109,151,572
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:    
Purchases of bitcoin (278,015,474) [1] (308,427,127)
Sales of bitcoin 0 [1] 349,041,710
Net realized (gain) loss on investment in bitcoin 0 [1] (73,974,049)
Net change in unrealized (appreciation) depreciation on investment in bitcoin (61,220,195) [1] (35,898,082)
Change in operating assets and liabilities:    
Sponsor's fee payable 21 [1] 301,310
Net cash provided by (used in) operating activities (278,015,474) [1] 40,195,334
Cash Flows from Financing Activities    
Proceeds from issuance of Shares 278,015,474 [1] 308,427,127
Payments on Shares redeemed 0 [1] (348,622,461)
Net cash provided by (used in) financing activities 278,015,474 [1] (40,195,334)
Cash    
Net increase in cash 0 [1] 0
Cash, beginning of period [1] 0 0
Cash, end of year $ 0 [1] $ 0
[1] On December 15, 2023, prior to the commencement of the Fund’s operations, Franklin Resources, Inc., an affiliate of the Sponsor (the “Seed Capital Investor”) purchased 4,000 Shares at a per-Share price equal to $25.00 (the “Initial Seed Shares”). Delivery of the Initial Seed Shares was made on December 15, 2023. Total proceeds to the Fund from the sale of the Initial Seed Shares were $100,000. On January 8, 2024, the Initial Seed Shares were redeemed for $100,000 and the Seed Capital Investor purchased two creation units in a cash transaction comprised of a total of 100,000 Shares at a per-Share price based on 29.00000000 bitcoins per Creation Unit (or 0.00058 bitcoins per Share), for a total of 58.00000000 bitcoins (the “Seed Creation Units”). The cash proceeds to the Fund from the sale of the Seed Creation Units were used by the Fund to purchase 58.00000000 bitcoins at the price of $44,973.58 per bitcoin on January 8, 2024. The transaction and other costs incurred in connection with the Seed Creation Units were paid by the Seed Capital Investor and not borne by the Fund. Thus, the ultimate total proceeds to the Fund from the sale of the Seed Creation Units were $2,608,467.81 (an amount representing 58.00000000 bitcoins).