COMBINED STATEMENTS OF CHANGES IN NET ASSETS - USD ($)		3 Months Ended		12 Months Ended
		Mar. 31, 2024		Mar. 31, 2025
Net assets, beginning of period	[1]	$ 2,665,457		$ 341,901,105
Increase (decrease) in net assets from capital share transactions:
Contributions for Shares issued	[2]	278,015,474	[1]	308,427,127
Distributions for Shares redeemed		0	[1]	(348,622,461)
Net increase (decrease) in net assets resulting from capital share transactions		278,015,474	[1]	(40,195,334)
Net assets, end of period		341,901,105	[1]	410,857,343
Net investment loss		(21)	[1]	(720,559)
Net realized gain (loss) on investment in bitcoin		0	[3]	73,974,049
Net change in unrealized appreciation (depreciation) on investment in bitcoin		61,220,195	[1]	35,898,082
Net decrease in net assets resulting from operations		61,220,174	[3]	109,151,572
Franklin Bitcoin ETF [Member]
Net assets, beginning of period	[1]	2,665,457		341,901,105
Increase (decrease) in net assets from capital share transactions:
Contributions for Shares issued	[4]	278,015,474	[1]	308,427,127
Distributions for Shares redeemed		0	[1]	(348,622,461)
Net increase (decrease) in net assets resulting from capital share transactions		278,015,474	[1]	(40,195,334)
Net assets, end of period		341,901,105	[1]	410,857,343
Net investment loss		(21)	[1]	(720,559)
Net realized gain (loss) on investment in bitcoin		0	[3]	73,974,049
Net change in unrealized appreciation (depreciation) on investment in bitcoin		61,220,195	[1]	35,898,082
Net decrease in net assets resulting from operations		$ 61,220,174	[3]	$ 109,151,572

[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).

[2] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.

[3] 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).

[4] Dollar amount of balance represents the cumulative fair value of creation of shares less the redemption of shares, at the time of the specific creation or redemption.