v3.26.1
Combined Statements of Operations - USD ($)
 3 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Expenses    
Sponsor’s fee $ 205,215 $ 237,309
Less waiver 0 0
Total expenses 205,215 237,309
Net investment loss (205,215) (237,309)
Net realized gain (loss) from bitcoin sold for the redemption of Shares and sold to pay expenses (396,857) 9,019,211
Net change in unrealized appreciation (depreciation) on investment in bitcoin (45,989,896) 119,518,907
Net realized and change in unrealized appreciation (depreciation) on investment in bitcoin (46,386,753) 128,538,118
Net increase (decrease) in net assets resulting from operations $ (46,591,968) $ 128,300,809
Net increase (decrease) in net assets per Share (in Dollars per share) [1] $ (4.47) $ 14.6
Franklin Bitcoin ETF [Member]    
Expenses    
Sponsor’s fee $ 205,215 $ 237,309
Less waiver 0 0
Total expenses 205,215 237,309
Net investment loss (205,215) (237,309)
Net realized gain (loss) from bitcoin sold for the redemption of Shares and sold to pay expenses (396,857) 9,019,211
Net change in unrealized appreciation (depreciation) on investment in bitcoin (45,989,896) 119,518,907
Net realized and change in unrealized appreciation (depreciation) on investment in bitcoin (46,386,753) 128,538,118
Net increase (decrease) in net assets resulting from operations $ (46,591,968) $ 128,300,809
Net increase (decrease) in net assets per Share (in Dollars per share) [1] $ (4.47) $ 14.6
[1] Net increase (decrease) in net assets per Share based on average shares outstanding during the period.