To follow-up on the comments from @PatriciaV, you will likely confront the same issue whether your cryptocurrency was stolen outright or whether it was first sold, resulting in a gain, and then removed from your account without your authorization. At least through 2025, casualty and theft losses relating to personal use property are no longer deductible, except to the extent that the casualty or theft loss occurred in a federally declared disaster area.
The IRS may likely request additional information from you if you elect to remove certain gains from the sale (albeit unauthorized) of your cryptocurrency. Given your specific situation, you may want to seek legal guidance on how best to handle this matter.
@LMiles
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