New FASB rules effective from Dec15 allow companies holding BTC to mark any holdings of their "imaginary" asset based on market value allowing them to report income/losses from their BTC treasuries.
https://www.ccn.com/news/crypto/bitcoin-financial-legitimacy-fasb-fair-value-accounting/
The Financial Accounting Standards Board (FASB) has officially adopted Fair Value Accounting for Bitcoin.
Effective for fiscal years beginning after Dec. 15, 2024, the new accounting rule will allow companies to more accurately reflect Bitcoin’s current market value in their financial statements.
By aligning the valuation of Bitcoin with market prices, this change is expected to increase transparency and potentially accelerate Bitcoin’s adoption as a treasury reserve asset among companies worldwide.
https://www.ccn.com/news/crypto/bitcoin-financial-legitimacy-fasb-fair-value-accounting/