Crypto Currency

How are Cryptocurrencies Taxed in the US?

The value of most Cryptocurrencies has skyrocketed over the last six months. Although there has been a recent fall in…

The value of most Cryptocurrencies has skyrocketed over the last six months. Although there has been a recent fall in prices, if you invested in a Cryptocurrency or received it as payment before December 2017 you are still probably sitting on a substantial financial gain.

As with any financial transaction you are subject to tax in the United States if you are a US citizen. The IRS has been very clear on this since 2014, it’s therefore important for you to understand whether you have a tax liability and how much that liability may be.

This short article will give you some guidance as to how you might begin to figure out what that tax liability might be.

How Cryptocurrency is defined by the government

According to the IRS virtual currency is a digital representation of value that functions as a medium of exchange, a unit of account, and/or a store of value. That describes Bitcoin or any Altcoin you may hold or have sold at a profit.  The IRS has stated that the sale or exchange of convertible virtual currency, or the use of convertible virtual currency to pay for goods or services in a real-world economy transaction, has tax consequences that may result in a tax liability so it might be worthwhile to know wann kryptowährung kaufen and the rules and regulations set out by your government when completing transactions or trading cryptocurrencies.

For federal tax purposes, Cryptocurrency is treated as property. General tax principles applicable to property transactions apply to transactions using Cryptocurrency. Under the currently applicable law, Cryptocurrency is not treated as currency that could generate foreign currency gain or loss for U.S. federal tax purposes.

This is an important technical distinction to note as many people view Crypto trading like forex trading, the IRS ,however, view it as a sale of property.

When does a tax liability arise?

Taking payment in Cryptocurrency

A taxpayer who receives Cryptocurrency as payment for goods or services must, in computing gross income, include the fair market value of the Cryptocurrency, measured in U.S. dollars, as of the date that the Cryptocurrency was received.

For U.S. tax purposes, transactions using Cryptocurrency must be reported in U.S. dollars. Therefore, taxpayers will be required to determine the fair market value of Cryptocurrency in U.S. dollars as of the date of payment or receipt. There is an easy way to calculate the fair market value If a Cryptocurrency is listed on an exchange and the exchange rate is established by market supply and demand.

The fair market value of the Cryptocurrency is determined by converting the Cryptocurrency into U.S. dollars (or into another real currency which in turn can be converted into U.S. dollars) at the exchange rate, in a reasonable manner that is consistently applied.

If you are self-employed and received Crypto as payment this includes you too. Self-employment income includes all gross income derived by an individual from any trade or business carried on by the individual as other than an employee. The fair market value of Cryptocurrency received for services performed as an independent contractor, measured in U.S. dollars as of the date of receipt is such income too.

Making an investment gain from trading Cryptocurrency

A taxpayer generally realizes capital gain or loss on the sale or exchange of Cryptocurrency that is a capital asset in the hands of the taxpayer. For example, stocks, bonds, and other investment property are generally capital assets. For most investors in Cryptocurrency, their coins will be a capital asset as they are bought as an investment, not as part of any business.

If this is you then you have to make a capital gains tax (CGT) payment on any gain.

For tax and accounting purposes, capital gains and losses are calculated by determining how much your cost basis has gone up or down from the time you acquired the asset. When you calculate your basis, you’ll figure the purchase price plus any related costs, such as commissions.

You need to pay the CGT when you sell or dispose of the Crypto. You may have a taxable event even if you don’t formally cash out. Anyone using cryptocurrency to pay for goods or services must treat each purchase as a sale.

Some exchanges will offer a summary of transactions which can be used to help you file your taxes but if you withdraw cryptocurrency from an exchange, the exchange can no longer track what happens, so you must make sure that you do.

What about mining Cryptocurrency?

When a taxpayer successfully “mines” Cryptocurrency, the fair market value of the virtual currency as of the date of receipt is includible in gross income.

If a taxpayer’s “mining” of Cryptocurrency constitutes a trade or business, and the “mining” activity is not undertaken by the taxpayer as an employee, the net earnings from self-employment (generally, gross income derived from carrying on a trade or business less allowable deductions) resulting from those activities constitute self-employment income and are subject to the self-employment tax.

What if I swap my Crypto for something else?

If the fair market value of property received in exchange for virtual currency exceeds the taxpayer’s adjusted basis of the Cryptocurrency, the taxpayer also has a taxable gain.

In summary

Whilst trading or taking Bitcoin or any Altcoin may seem like fun, as many projects involving blockchain technology most certainly are, these activities generate serious financial obligations in the United States.

It is important that you are careful and maintain detailed records of any transactions you make using Crypto, in particular, the equivalent US dollar value of the Crypto at the time of the transaction.

As summarised above your tax liability, be it CGT or otherwise, depends on how you are using Cryptocurrency. This short guide will give you a start, but it is always best to get professional advice when it comes to your exact tax liability, especially if your activity in this area is substantial.

Taxpayers may be subject to penalties for failure to comply with tax laws and they can be very large.

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Crypto Currency

A simple explainer on what quantum computing actually is, and why it is terrifying for bitcoin

Tech Share Share this article Copy link X icon X (Twitter) LinkedIn Facebook Email A simple explainer on what quantum computing actually is, and why it is terrifying for bitcoin Most simplifies the complex process of quantum computing as “it can be 0 and 1 at the same time.” That is not an explanation for

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A simple explainer on what quantum computing actually is, and why it is terrifying for bitcoin

Most simplifies the complex process of quantum computing as “it can be 0 and 1 at the same time.” That is not an explanation for why it threatens Bitcoin. This is.

By Shaurya Malwa|Edited by Aoyon Ashraf
Updated Apr 6, 2026, 5:00 a.m. Published Apr 5, 2026, 8:03 p.m.
Make preferred on
(Misha Friedman/Getty Images)

What to know:

  • Google has published research suggesting a future quantum computer could theoretically derive a bitcoin private key from its public key in about nine minutes, threatening the security of Bitcoin and other cryptographic systems.
  • Unlike classical computers, which process bits as either 0 or 1, quantum computers use qubits that can exist in multiple states simultaneously and exploit phenomena like superposition and entanglement to explore many possibilities at once.
  • This fundamentally different form of computation could undermine the mathematical assumptions behind current encryption, raising urgent concerns about the safety of existing blockchain assets and digital security more broadly.

This week, Google published a paper describing how a quantum computer could theoretically derive a bitcoin private key in 9 minutes, with ramifications that stretch to Ethereum, other tokens, private banking, and potentially everything in the world.

Quantum computing is easy to mistake for a faster version of a regular computer. But it is not a more powerful chip or a bigger server farm. It is a fundamentally different kind of machine, different at the level of the atom itself.

A quantum computer starts with a very cold, very small loop of metal where particles begin to behave in ways they do not behave under normal conditions on Earth, ways that alter what we think of as the basic rules of physics.

Understanding what that means, physically, is the difference between reading about the quantum threat and actually grasping it.

How computers and quantum computers actually work

Regular computers store information as bits — each is either a 0 or a 1. A bit is a tiny switch. Physically, it’s a transistor on a “chip” — a microscopic gate that either lets electricity through (1) or doesn’t (0).

Every photo, every bitcoin transaction, every word you’ve ever typed is stored as patterns of these switches being on or off. There is nothing mysterious about a bit; it is a physical object in one of the two definite states.

Every calculation is just shuffling these 0s and 1s around really fast. A modern chip can do billions of these per second, but it still does them one at a time, in sequence.

Quantum computers use something known as qubits instead of bits. A qubit can be 0, 1, or — and this is the weird part — both at the same time!

This is possible as a qubit is a completely different kind of physical object. The most common version, and the one Google uses, is a tiny loop of superconducting metal cooled to about 0.015 degrees above absolute zero, colder than outer space but here on Earth.

At that temperature, electricity flows through the loop without any resistance, and the current is said to exist in a quantum state.

In the superconducting loop, current can flow clockwise (call that 0) or counterclockwise (call that 1). But at quantum scales, the current does not have to pick one direction and actually flows in both directions simultaneously.

Don’t mistake it for switching between the two really fast. The current is measurably, experimentally and verifiably in both states simultaneously.

(CoinDesk)

Mind-bending physics

With us so far? Great, because here’s where it gets genuinely strange, because the physics behind how it works isn’t immediately intuitive, and it is not supposed to be.

Everything someone interacts with in daily life obeys classical physics, which assumes that things are in one place at one time. But particles do not behave this way at the subatomic scale.

An electron does not have a definite position until you look at it. A photon does not have a definite polarization until you measure it. A current in a superconducting loop does not flow in a definite direction until you force it to pick.

The reason we don’t experience this in everyday life is decoherence. When a quantum system interacts with its environment, air molecules, heat, vibrations and light, the superposition collapses almost instantly.

A football cannot be in two places at once because it is interacting with trillions of air molecules, dust, sound, heat, gravity, etc., every nanosecond. But isolate a tiny current in a near-absolute-zero vacuum, shield it from every possible disturbance, and the quantum behavior survives long enough to compute with.

That’s why quantum computers are so hard to build. People are engineering physical environments where the laws of physics that normally prevent this stuff from happening are held at bay for just long enough to run a calculation.

Google’s machines operate in dilution refrigerators the size of huge rooms, colder than anything in the natural universe, surrounded by layers of shielding against electromagnetic noise, vibration, and thermal radiation.

And the qubits are fragile even then. They lose their quantum state constantly, which is why “error correction” dominates every conversation about scaling up.

So quantum computing is not a faster version of classical computing. It is exploiting a different set of physical laws that only apply at extremely small scales, extremely low temperatures, and extremely short timeframes.

(CoinDesk)

Now stack that up.

Two regular bits can be in one of four states (00, 01, 10, 11), but only one at a time (since current flows in only one direction). Two qubits can represent all four states at once, as the current is flowing in all directions at the same time.

Three qubits represent eight states. Ten qubits represent 1,024. Fifty qubits represent over a quadrillion. The number doubles with every qubit that is added, which is why the scaling is so exponential.

The second trick is something called entanglement. When two qubits are entangled, measuring one instantly tells an observer something about the other, no matter how far apart they are. This lets a quantum computer coordinate across all those simultaneous states in a way that regular parallel computing cannot.

And these quantum computers are set up so that wrong answers cancel each other out (like overlapping waves that flatten) and right answers reinforce each other (like waves that stack higher). By the end of the computation, the correct answer has the highest probability of being measured.

So it’s not brute-force speed. It’s a fundamentally different approach to calculation — one that lets nature explore an exponentially large space of possibilities and then collapses to the right answer through physics rather than logic.

A monumental threat to cryptography

This mind-bending physics is why it is terrifying for encryption.

The math protecting bitcoin relies on the assumption that checking every possible key would take longer than the age of the universe.

But a quantum computer doesn’t check every key. It explores all of them simultaneously and uses interference to surface the right one.

That is where it ties into Bitcoin. Going one direction, from private key to public key, takes milliseconds. Going the other direction, from public key back to private key, would take a classical computer a million years, or even longer than the age of the universe. That asymmetry is the only thing proving that a person is holding their coins.

(CoinDesk)

A quantum computer running an algorithm called Shor’s can go through that trapdoor in reverse. Google’s paper this week showed it could do so with far fewer resources than anyone previously estimated, and within a timeframe that races against bitcoin’s own block confirmations.

This is why the threat of quantum computers breaking blockchain encryption is genuinely making everyone very worried.

How that attack works step by step, what Google’s paper specifically changed, and what it means for the 6.9 million bitcoin already exposed, is the subject of the next piece in this series.

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