v3.26.1
Combined Schedules of Investments
Jun. 30, 2026
USD ($)
Bitcoin
Mar. 31, 2026
USD ($)
Bitcoin
Combined Schedule of Investments [Abstract]    
Quantity of Bitcoin (in Bitcoin) | Bitcoin 5,664.0163 6,302.8336
Total investments, Cost $ 424,710,391 $ 473,378,477
Total investments, Fair Value [1] $ 334,751,802 $ 429,409,784
Total investments, Fair Value as a % of Net Assets 100.02% 100.02%
Less liabilities, Fair Value $ (56,873) $ (69,685)
Less liabilities, Fair Value as a % of Net Assets (0.02%) (0.02%)
Net assets $ 334,694,929 $ 429,340,099
Net assets, Fair Value as a % of Net Assets 100.00% 100.00%
Bitcoin [Member]    
Combined Schedule of Investments [Abstract]    
Quantity of Bitcoin (in Bitcoin) | Bitcoin 5,664.0163 6,302.8336
Total investments, Cost $ 424,710,391 $ 473,378,477
Total investments, Fair Value $ 334,751,802 $ 429,409,784
Total investments, Fair Value as a % of Net Assets 100.02% 100.02%
Franklin Bitcoin ETF [Member]    
Combined Schedule of Investments [Abstract]    
Quantity of Bitcoin (in Bitcoin) | Bitcoin 5,664.0163 6,302.8336
Total investments, Cost $ 424,710,391 $ 473,378,477
Total investments, Fair Value [1] $ 334,751,802 $ 429,409,784
Total investments, Fair Value as a % of Net Assets 100.02% 100.02%
Less liabilities, Fair Value $ (56,873) $ (69,685)
Less liabilities, Fair Value as a % of Net Assets (0.02%) (0.02%)
Net assets $ 334,694,929 $ 429,340,099
Net assets, Fair Value as a % of Net Assets 100.00% 100.00%
Franklin Bitcoin ETF [Member] | Bitcoin [Member]    
Combined Schedule of Investments [Abstract]    
Quantity of Bitcoin (in Bitcoin) | Bitcoin 5,664.0163 6,302.8336
Total investments, Cost $ 424,710,391 $ 473,378,477
Total investments, Fair Value $ 334,751,802 $ 429,409,784
Total investments, Fair Value as a % of Net Assets 100.02% 100.02%
[1] Cost of investment in bitcoin: $424,710,391 at June 30, 2026 and $473,378,477 at March 31, 2026.