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Creation and Redemption of Shares - Additional Information (Details)	12 Months Ended
	Dec. 31, 2025 shares
Equity [Abstract]
Number of shares in block issued	10,000

X

- Definition

Number of shares in block issued.

+ References

No definition available.

+ Details

Name:	bitb_NumberOfSharesInBlockIssued
Namespace Prefix:	bitb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration