Schedules of Investments (Unaudited) - Investments (Details)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	May 21, 2024 USD ($)
Ether	3,842,823	1,768,573		1,071,415	387,843	3,031	0
Investment in ether, at cost	$ 13,483,951,930	$ 5,242,898,137		$ 3,543,902,275	$ 1,157,342,168	$ 10,000,000	$ 0
Ether fair value	15,874,086,142			3,571,669,777
Liabilities in Excess of Other Assets	(3,307,620)			(407,610)
Net Assets	$ 15,870,778,522	$ 4,395,795,808	$ 2,186,390,619	$ 3,571,262,167	$ 1,019,342,543	$ 10,589,875	$ 0