Combined Statement of Cash Flows - USD ($)		3 Months Ended	6 Months Ended
		Sep. 30, 2024	Sep. 30, 2024
Cash Flows from Operating Activities
Net increase (decrease) in net assets resulting from operations	[1]	$ 2,672,031	$ (33,618,247)
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of bitcoin	[1]		(209,726,374)
Sales of bitcoin	[1]		65,776,280
Net realized (gain) loss on investment in bitcoin	[1]		1,156,994
Net change in unrealized (appreciation) depreciation on investment in bitcoin	[1]	(4,121,057)	32,337,968
Change in operating assets and liabilities:
Sponsor's fees payable	[1]		65,596
Net cash provided by (used in) operating activities	[1]		(144,007,783)
Proceeds from issuance of Shares	[1]		209,726,374
Payments on Shares redeemed	[1]		(65,718,591)
Net cash provided by (used in) financing activities	[1]		144,007,783
Cash Flows from Financing Activities:
Net increase in cash	[1]		0
Cash, beginning of period	[1]		0
Cash, end of period	[1]	0	0
Franklin Bitcoin ETF [Member]
Cash Flows from Operating Activities
Net increase (decrease) in net assets resulting from operations	[1]	2,672,031	(33,618,247)
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of bitcoin	[1]		(209,726,374)
Sales of bitcoin	[1]		65,776,280
Net realized (gain) loss on investment in bitcoin	[1]		1,156,994
Net change in unrealized (appreciation) depreciation on investment in bitcoin	[1]	(4,121,057)	32,337,968
Change in operating assets and liabilities:
Sponsor's fees payable	[1]		65,596
Net cash provided by (used in) operating activities	[1]		(144,007,783)
Proceeds from issuance of Shares	[1]		209,726,374
Payments on Shares redeemed	[1]		(65,718,591)
Net cash provided by (used in) financing activities	[1]		144,007,783
Cash Flows from Financing Activities:
Net increase in cash	[1]		0
Cash, beginning of period	[1]		0
Cash, end of period	[1]	$ 0	$ 0

[1] No comparative period presented as the Fund’s operations commenced on January 11, 2024.