Combined Statements of Operations - USD ($)		3 Months Ended		9 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Expenses
Sponsor’s fee		$ 278,172	$ 295,795	$ 812,154	$ 664,201
Less waiver		0	0	0	(245,121)
Total expenses		278,172	295,795	812,154	419,080
Net investment loss		(278,172)	(295,795)	(812,154)	(419,080)
Net realized gain (loss) from bitcoin sold for the redemption of shares and sold to pay expenses		6,465,881	2,814,719	22,776,065	1,657,725
Net change in unrealized appreciation (depreciation) on investment in bitcoin		(163,300,788)	211,365,660	(22,665,827)	179,027,692
Net realized and change in unrealized appreciation (depreciation) on investment in bitcoin		(156,834,907)	214,180,379	110,238	180,685,417
Net increase (decrease) in net assets resulting from operations		$ (157,113,079)	$ 213,884,584	$ (701,916)	$ 180,266,337
Net increase (decrease) in net assets per Share (in Dollars per share)	[1]	$ (15.66)	$ 16.75	$ (0.07)	$ 15.94
Franklin Bitcoin ETF [Member]
Expenses
Sponsor’s fee		$ 278,172	$ 295,795	$ 812,154	$ 664,201
Less waiver		0	0	0	(245,121)
Total expenses		278,172	295,795	812,154	419,080
Net investment loss		(278,172)	(295,795)	(812,154)	(419,080)
Net realized gain (loss) from bitcoin sold for the redemption of shares and sold to pay expenses		6,465,881	2,814,719	22,776,065	1,657,725
Net change in unrealized appreciation (depreciation) on investment in bitcoin		(163,300,788)	211,365,660	(22,665,827)	179,027,692
Net realized and change in unrealized appreciation (depreciation) on investment in bitcoin		(156,834,907)	214,180,379	110,238	180,685,417
Net increase (decrease) in net assets resulting from operations		$ (157,113,079)	$ 213,884,584	$ (701,916)	$ 180,266,337
Net increase (decrease) in net assets per Share (in Dollars per share)	[1]	$ (15.66)	$ 16.75	$ (0.07)	$ 15.94

[1] Net increase (decrease) in net assets per Share based on average shares outstanding during the period.