v3.26.3
COMBINED STATEMENTS OF CASH FLOWS - USD ($)
 7 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2026
Cash Flows from Operating Activities    
Net increase (decrease) in net assets resulting from operations $ 1,028,005 $ 1,495,974
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:    
Purchases of Digital Assets for creations (4,044,659) (7,295,569)
Purchases of Digital Assets for rebalancing (26,917) (95,193)
Sales of Digital Assets for the redemption of Shares and to pay expenses 0 1,998,123
Sales of Digital Assets for rebalancing 26,917 95,193
Net realized (gain) loss from Digital Assets sold for the redemption of Shares and sold to pay expenses (315) 96,895
Net realized (gain) loss from Digital Assets sold for rebalancing 0 38,343
Net change in unrealized (appreciation) depreciation on investments in Digital Assets (1,028,699) (1,648,404)
Change in operating assets and liabilities:    
Sponsor's fee payable 1,009 1,139
Net cash provided by (used in) operating activities (4,044,659) (5,313,499)
Cash Flows from Financing Activities    
Proceeds from issuance of Shares 4,044,659 7,295,474
Payments on Shares redeemed 0 (1,981,975)
Net cash provided by (used in) financing activities 4,044,659 5,313,499
Cash    
Net increase (decrease) in cash 0 0
Cash, beginning of period 0 0
Cash, end of period 0 0
Franklin Crypto Index ETF [Member]    
Cash Flows from Operating Activities    
Net increase (decrease) in net assets resulting from operations 1,028,005 1,495,974
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:    
Purchases of Digital Assets for creations (4,044,659) (7,295,569)
Purchases of Digital Assets for rebalancing (26,917) (95,193)
Sales of Digital Assets for the redemption of Shares and to pay expenses 0 1,998,123
Sales of Digital Assets for rebalancing 26,917 95,193
Net realized (gain) loss from Digital Assets sold for the redemption of Shares and sold to pay expenses (315) 96,895
Net realized (gain) loss from Digital Assets sold for rebalancing 0 38,343
Net change in unrealized (appreciation) depreciation on investments in Digital Assets (1,028,699) (1,648,404)
Change in operating assets and liabilities:    
Sponsor's fee payable 1,009 1,139
Net cash provided by (used in) operating activities (4,044,659) (5,313,499)
Cash Flows from Financing Activities    
Proceeds from issuance of Shares 4,044,659 7,295,474
Payments on Shares redeemed 0 (1,981,975)
Net cash provided by (used in) financing activities 4,044,659 5,313,499
Cash    
Net increase (decrease) in cash 0 0
Cash, beginning of period 0 0
Cash, end of period $ 0 $ 0