Significant Accounting Policies - Summary of Principal Market and the Principal Market Prices for Portfolio Cryto Assets Comprised Majority of Trust Assets (Detail) - Coinbase [Member] - Fair Value Measured at Net Asset Value Per Share [Member]	Jun. 30, 2022 $ / shares
Bitcoin [Member]
Principal Market Price	$ 18,895.01
Ethereum [Member]
Principal Market Price	1,019.72
Solana [Member]
Principal Market Price	31.98
Cardano [Member]
Principal Market Price	0.44
Avalanche [Member]
Principal Market Price	16.24
Polkadot [Member]
Principal Market Price	6.81
Polygon [Member]
Principal Market Price	0.45
Litecoin [Member]
Principal Market Price	51.43
Bitcoin Cash [Member]
Principal Market Price	99.92
Chainlink [Member]
Principal Market Price	$ 6.04