Can I deduct bitcoin SCAM?

Prior to 2018, losses due to theft could be deducted as an itemized deduction, but the Tax Cuts and Jobs Act limited the theft loss deduction to losses attributable to a federally declared disaster until 2025.  

There is a special exception for victims of Ponzi-type investment schemes.  According to IRS Revenue Ruling 2009-9,  if money put into an investment account with the expectation of profit is found to be fraudulent, any loss is considered a business theft loss and not a personal theft loss. Therefore, the personal theft loss limitation stated above does not apply.  If you determine you qualify under Ruling 2009-9, you can take your loss as an itemized deduction.  If your deductions aren't enough to itemize, you won't be able to deduct the loss.

your loss does not seem to be from a Ponzi-type scheme. A Ponzi scheme is when there are multiple investors some of which get a fake return by the perps by using the money from later investors to provide a return to earlier investors. none of the returns are real.  notice the key words investment scheme. just breaking into your computer I don't think is an investment scheme.     I think this is more like your house got robbed which under the tax laws is a non-deductible personal casualty loss. 

Rev. Rul. 2009-9
Tax treatment of losses. This ruling addresses the tax treatment of losses from criminally fraudulent investment arrangements that take the form of “Ponzi” schemes. Rev. Rul. 71-381 obsoleted in part.

ISSUES
(1) Is a loss from criminal fraud or embezzlement in a transaction entered into for profit a theft loss or a capital loss under § 165 of the Internal Revenue Code?

(2) Is such a loss subject to either the personal loss limits in § 165(h) or the limits on itemized deductions in §§ 67 and 68?

(3) In what year is such a loss deductible?

(4) How is the amount of such a loss determined?

(5) Can such a loss create or increase a net operating loss under § 172?

(6) Does such a loss qualify for the computation of tax provided by § 1341 for the restoration of an amount held under a claim of right?

(7) Does such a loss qualify for the application of §§ 1311-1314 to adjust tax liability in years that are otherwise barred by the period of limitations on filing a claim for refund under § 6511?

FACTS
A is an individual who uses the cash receipts and disbursements method of accounting and files federal income tax returns on a calendar year basis. B holds himself out to the public as an investment advisor and securities broker.

In Year 1, A, in a transaction entered into for profit, opened an investment account with B, contributed $100x to the account, and provided B with power of attorney to use the $100x to purchase and sell securities on A’s behalf. A instructed B to reinvest any income and gains earned on the investments. In Year 3, A contributed an additional $20x to the account.

B periodically issued account statements to A that reported the securities purchases and sales that B purportedly made in A’s investment account and the balance of the account. B also issued tax reporting statements to A and to the Internal Revenue Service that reflected purported gains and losses on A’s investment account. B also reported to A that no income was earned in Year 1 and that for each of the Years 2 through 7 the investments earned $10x of income (interest, dividends, and capital gains), which A included in gross income on A’s federal income tax returns.

At all times prior to Year 8 and part way through Year 8, B was able to make distributions to investors who requested them. A took a single distribution of $30x from the account in Year 7.

In Year 8, it was discovered that B’s purported investment advisory and brokerage activity was in fact a fraudulent investment arrangement known as a “Ponzi” scheme. Under this scheme, B purported to invest cash or property on behalf of each investor, including A, in an account in the investor’s name. For each investor’s account, B reported investment activities and resulting income amounts that were partially or wholly fictitious. In some cases, in response to requests for withdrawal, B made payments of purported income or principal to investors. These payments were made, at least in part, from amounts that other investors had invested in the fraudulent arrangement.

When B’s fraud was discovered in Year 8, B had only a small fraction of the funds that B reported on the account statements that B issued to A and other investors. A did not receive any reimbursement or other recovery for the loss in Year 8. The period of limitation on filing a claim for refund under § 6511 has not yet expired for Years 5 through 7, but has expired for Years 1 through 4.

B’s actions constituted criminal fraud or embezzlement under the law of the jurisdiction in which the transactions occurred. At no time prior to the discovery did A know that B’s activities were a fraudulent scheme. The fraudulent investment arrangement was not a tax shelter as defined in § 6662(d)(2)(C)(ii) with respect to A.

LAW AND ANALYSIS
Issue 1. Theft loss.
Section 165(a) allows a deduction for losses sustained during the taxable year and not compensated by insurance or otherwise. For individuals, § 165(c)(2) allows a deduction for losses incurred in a transaction entered into for profit, and § 165(c)(3) allows a deduction for certain losses not connected to a transaction entered into for profit, including theft losses. Under § 165(e), a theft loss is sustained in the taxable year the taxpayer discovers the loss. Section 165(f) permits a deduction for capital losses only to the extent allowed in §§ 1211 and 1212. In certain circumstances, a theft loss may be taken into account in determining gains or losses for a taxable year under § 1231.

For federal income tax purposes, “theft” is a word of general and broad connotation, covering any criminal appropriation of another’s property to the use of the taker, including theft by swindling, false pretenses and any other form of guile. Edwards v. Bromberg, 232 F.2d 107 (5th Cir. 1956); see also § 1.165-8(d) of the Income Tax Regulations (“theft” includes larceny and embezzlement). A taxpayer claiming a theft loss must prove that the loss resulted from a taking of property that was illegal under the law of the jurisdiction in which it occurred and was done with criminal intent. Rev. Rul. 72-112, 1972-1 C.B. 60. However, a taxpayer need not show a conviction for theft. Vietzke v. Commissioner, 37 T.C. 504, 510 (1961), acq., 1962-2 C.B. 6.

The character of an investor’s loss related to fraudulent activity depends, in part, on the nature of the investment. For example, a loss that is sustained on the worthlessness or disposition of stock acquired on the open market for investment is a capital loss, even if the decline in the value of the stock is attributable to fraudulent activities of the corporation’s officers or directors, because the officers or directors did not have the specific intent to deprive the shareholder of money or property. See Rev. Rul. 77-17, 1977-1 C.B. 44.

In the present situation, unlike the situation in Rev. Rul. 77-17, B specifically intended to, and did, deprive A of money by criminal acts. B’s actions constituted a theft from A, as theft is defined for § 165 purposes. Accordingly, A’s loss is a theft loss, not a capital loss.