I was poking around some other companies that will have similar issues going forward and my general conclusion is that you would not have the ability to include upward valuations, even under a non-GAAP presentation.
Non-GAAP presentation does not allow a reporter to introduce new information, it only allows someone to change the order of presentation or to add sub totals (eg, EBIT and EBITDA are non-gaap measures) or adjust sub totals to remove amounts (eg, removal of SBC).
One example would be Microstrategy, below are extracts from their recent 10-K. Not only do they not even report the FMV value of their BTC in notes disclosure (I would have at least expected that, but apparently the auditors didn’t agree), they took a loss on some of their BTC, given that impairment is an any point in time test ( if it drops below your purchase price for even one second you have an impairment loss to take).
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So, while I personally think using OCI to show the gains would make sense, and actually be more consistent with IFRS presentation, I don’t think Tesla will have that option, even if trying to rely on non-GAAP reporting.
Edit: Formatting. Also to add that I reviewed RIOT Blockchain's reporting, and again, even though they would have heavy incentive to at the very least report the fair market value (FMV) of their crypto assets in the note disclosures, they did not do that. They do however show
realized gains from crypto sales as well as record their revenues from mining operations based on the FMV of the crypto awarded to them for mining services.
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