Bitcoin Forks: Where does your currency go when the chain breaks?

When the blockchain forges, your Bitcoin will not disappear.

After the fork, you hold Bitcoin on both chains at the same time because both chains share all the history before the fork. One balance becomes two. Whether you actually receive the second balance, and whether you can safely transfer it, depends on two questions: who holds the private key and whether there are safeguards against doubly valid transactions. This article answers these two questions, explains relevant terms, and sorts out Germany's tax stance.

This incident has a specific background. On October 31, 2026, there will be a permanent fork in the Bitcoin blockchain. The new chain will be named eCash and the token code ECX. This concerns every Bitcoin holder, whether they have heard of the project or not. Before discussing this specific case, it is necessary to explain the principles behind it, as the process repeats every time the chain branches.

What is a Bitcoin fork? Why does your coin exist on both chains after fork?

Forking is a change to the rules for the network to accept valid blocks. This is a single-sentence definition that already explains the consequences: When participants disagree about new rules, they will start at a certain block and continue the chain in different ways. Since then, there have been two blockchains, and each block up to the fork point is exactly the same.

The decisive factor is the shared historical record. The Bitcoin balance is not an object stored somewhere, but a record in the chain ledger. Copying the ledger is copying the record. A person who holds two bitcoins before the fork will show two units in each of the two ledgers after the fork. The technical term for this automatic credit is "fork airdrop": the allocation of the new coin does not require anyone to claim or apply because it originates from the copied ledger.

Your Bitcoin itself is not affected. The Bitcoin network will not change due to the fork, and it will continue to operate according to existing rules. A second chain coexisting with it was born, with its own software, its own miners and its own market price. This price may be high, low, or even non-existent at all because there is no trading platform to list the new currency.

Hard fork vs. soft fork: Only one will create a second blockchain

The difference between the two is often confused, although it is actually simple.

Soft forks tighten the rules. Transactions that are valid under the new rules will also be valid under the old rules. As a result, old software versions will continue to accept new blocks and the network remains a single chain. As a holder, you will not see any changes and no new coins will be generated.

Hard forks relax or change rules, causing older versions of software to reject new blockages. Each camp believes its block is right. This creates a permanent fork, forming two chains and two balances. You suddenly realize that every situation where you have more new coins in your account is a hard fork.

A hard fork does not necessarily succeed. It can also become a side chain that is rarely used. This has no direct impact on what happens to your balance: no matter which chain later succeeds, the new coins will appear on both chains.

ECX fork on October 31, 2026: Chain drive, block height and three phases

Behind the planned fork is Paul Sztorc, founder of LayerTwo Labs, who has been advocating a concept called "chain drive" for years. A drive chain is a side chain. Coins can be transferred from the main chain to the side chain and then transferred back. The main chain does not need to set up its own counterparty for this purpose. Sztorc proposed the concept in 2015 and later formally submitted it to Bitcoin developers in the form of BIP300 and BIP301, but it was not adopted. The new chain is an attempt to implement the concept without consent.

On August 7, 2026, the schedule changed. The original single launch date has now been changed to three phases, each phase corresponding to a fixed block height. The block height is the serial number of the blocks on the chain, which is more reliable than clock time because it applies regardless of the mining speed.

Phase 1 (Alpha): August 23, 2026, Block 963,648. It is clearly a temporary version.

Phase 2 (Beta): September 20, 2026, Block 967,680.

Phase 3 (permanent start): October 31, 2026, Block 973,728. The date is symbolic: it is the 18th anniversary of the release of the Bitcoin white paper.

According to the project party, the early stage will be as close to the final version as possible; the coins in the test stage will be destroyed later and can be exchanged for real ECX. Sztorc's phased reasons include clearing software bugs, early price discovery in the market, and the ability to correct direction when major problems arise.

There is a controversial point in the design that any introduction should mention: the new chain does not inherit all Bitcoin balances unconditionally. Coins belonging to Satoshi Nakamoto were excluded from the airdrop. Critics in the developer community argue that the interference violates the principle that copies of the ledger must be accurately copied; it is an evaluation rather than a finding of fact. For your own balance, this dispute will have no impact.

Explanation of names: eCash is not a new term in the industry. An earlier project has been traded with a very similar name and a different token code. If searching for prices or transaction pairs, it is best to check the token code rather than the name.

Snapshots and Block Height: The moment your balance is counted at fork

Snapshots are ledger snapshots that serve as the basis for airdrops. It is fixed at a block height, not clock time. On that block, what is in your address determines what is assigned to you on the new chain.

This leads to two practical points. First, as long as you keep your bitcoins, you don't need to rush before the date approaches: the snapshot will automatically find you without taking any action. Second, if your currency is deposited on the trading platform during this period, buying and selling in that window is not helpful because the address of the platform provider is recorded in the online ledger, not your address.

This is the key to determining who receives the bifurcated airdrop. This issue will be discussed in the next section.

Private key determines everything: Why Bitcoin on trading platforms often gets nothing when forking

Private key is a mysterious number used to sign transactions; whoever holds the private key controls the coin.

If your Bitcoin is stored on a trading platform, the private key belongs to the platform provider. The address of the provider is recorded in the ledger on the chain, so the fork airdrop also reaches there accordingly. As for whether you can see these coins, it is purely a business decision of the provider. It can credit the new currency and make it tradeable, or it can lock it after it is credited, and it can decide not to support the fork at all. It has no obligation to do any of these. In practice, decisions depend on whether the new chain proves technically stable and whether it is cost-effective to do so.

A current case from a nearby field shows how tricky this can become: When the ICON network migrates to SODA, everything for centralized trading platform customers depends on whether their providers perform the migration. Some providers completed the migration without requiring any action from customers, while others announced ordinary delisting. For details and deadlines, please refer to our article on ICX migration and its deadlines. The pattern at the time of fork is the same, except for different triggers.

If you want to know what happens when a provider completely removes a coin, our article on the impact of delisting on tokens explains the specific mechanisms for each restriction stage. Both situations boil down to the same lesson: balances placed in trust by others must follow the decisions of others.

Vice versa. If you hold the private key, you don't need anyone's consent. The new chain will recognize your address because it uses the same cryptographic foundation. Whether you process the resulting balance is entirely up to you. If you are rethinking custody arrangements, you might want to calmly review the terms in the comparison of cryptocurrency exchanges, as custody practices vary widely among different providers.

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Hardware wallet or software wallet: Where can your Bitcoin safely survive chain forks

For the airdrop itself, the wallet type does not matter. But it is crucial for all subsequent operations.

A hardware wallet is a stand-alone device used to store private keys and sign transactions on the device, never revealing the private keys to a computer. This has a special value when forking: To access the new chain, unfamiliar and freshly released software is often needed. If the software fails to perform as promised by the project, a device that does not hand over the private key can limit the damage. For an overview of common devices, prices and supported currencies, see Hardware Wallet Comparison.

A software wallet on a computer or mobile phone in principle does the same thing, but saves the private key in an environment with a much larger attack surface. Anyone who wants to try to fork their wallet should never do so on the device where the mnemonic words are hosted.

A mnemonic is a sequence of words that can derive all private keys of a wallet. This makes it the real target in every fork attack and should never be imported into new software from your unverified source under any circumstances.

Tax treatment of hard forks: Provisions on acquisition costs in the German Ministry of Finance's letter dated March 6, 2025

This is a part that German investors often ignore, but in most cases it benefits them. The guidance document is a letter from the Federal Ministry of Finance dated March 6, 2025 on the treatment of income tax on cryptocurrency assets.

Three of these decisions are crucial to you.

Airdrop itself does not trigger taxes. Hard forks do not generate income within the meaning of Article 22, paragraph 3, of the Income Tax Law. The fact that the new currency was suddenly allocated is not in itself a taxable event.

The acquisition date is used. New crypto assets are considered to be obtained at the moment you obtain the original coin. Therefore, your holding period will not start counting again.

Acquisition costs are apportioned proportionately. The acquisition cost of crypto assets held before the fork is apportioned between the old currency and the new currency based on the proportion of the market prices of the old and new currencies at the time of the fork.

If you sell new coins, the proceeds are a private disposal transaction within the meaning of Article 22, paragraph 2, combined with Article 23, paragraph 1, sentence 2, of the Income Tax Law, provided that there is no more than one year between the acquisition of the original coin and the sale.

The practical consequences are worth noting: If you have held Bitcoin for more than a year, the resulting forked coin is out of one year from the beginning because the acquisition date shifts accordingly. In contrast, people who have just bought and sold within a year will have to pay tax. Since apportioning acquisition costs requires the market price at the time of forking, you need to have a clear record as evidence; for common tools, please refer to Comparison of Cryptocurrency Tax Software. The above content cannot replace tax advice in individual cases.

Replay protection is optional on ECX: How replay attacks affect your transactions

Replay attacks are when a transaction you sign on one chain is submitted again and is equally valid on another chain. This is because the two chains use the same address and the same signature scheme after the fork. What works for one chain also works for another chain.

The loss is real. You plan to transfer Bitcoin, but the same transfer will be performed unintentionally on the new chain. Those who believe the new coin is worthless may lose little; but those who plan to keep it will unknowingly send it to the recipient.

Replay protection is a technical measure that makes transactions on two chains distinguishable so that signatures are valid only on one chain. Early forks built it into as a standard. According to the project party, it is optional on ECX: the new chain official wallet will apply replay protection and warn users before sending, but it is not mandatory. Sztorc bluntly stated that anyone who ignored the warning would find its trade replayed. For relevant supporting materials, please refer to the instructions for launching the three-phase fork.

For you, this means that around three key dates, it is safest to do nothing. In those days, there were no people who needed to be moved, so nothing was moved.

Bitcoin Cash and other outcomes of early Bitcoin forks

History provides the coolest measure of expectations. On August 1, 2017, Bitcoin cash was diverted from Bitcoin due to a dispute over block size (that is, a dispute over transaction expansion routes). In October of the same year, Bitcoin Gold followed closely, using a different mining algorithm. In November 2018, Bitcoin SV forked again from Bitcoin Cash, once again due to a dispute over direction.

None of these chains has replaced Bitcoin, which was their stated goal. Some have survived as independent networks, while others have fallen into irrelevant situations. After each fork, the market value of the new coin is much lower than the main chain in a short period of time.

Both patterns occur repeatedly. Attention and demand rose ahead of the fork date as the prospect of free distribution attracted interest. Shortly after the fork date, the price of new coins often falls sharply as many recipients sell things they never wanted to buy. Neither is a prediction of ECX, but an observation of past cases; how any individual bifurcation will develop cannot be determined in advance.

Counterfeit fork wallets: How to spot the mnemonic trap in time

Every announced fork brings a wave of quotes that claim to simplify receiving new coins. Some are well-intentioned, some are designed to get your mnemonic words. The routines are similar.

Stop immediately when the following warning signs appear:

The website or App requires you to enter a mnemonic or private key to "unlock" the new coin. This has never been a technically necessary operation for airdrops originating from duplicate ledgers.

You are told to first send a small amount of Bitcoin to an address to prove your ownership.

Dates are rendered as tight deadlines and countdown displays, although fork airdrops depend on block height and do not expire.

Software is distributed through links on social media rather than from sources specified by the project party.

A support account contacts you uninvited and provides assistance with collection.

The response was bland and effective: wait. Forked airdrops will not fail. If you check whether the new chain is available a few weeks later, there will be no loss other than lost time, and you can avoid the first wave of attacks.

How to survive Bitcoin Forking Safely: Summary of Points

If you really want to fork coins, please transfer Bitcoin to your own custody before October 31, 2026.

Only the person holding the private key can receive airdrops independent of any provider's decisions. Please refer to Hardware Wallet Comparison for suitable devices.

If you leave the balance on the platform, please know in advance how your provider will handle forking. Only a written announcement from the provider's own is a commitment, and the most common answer is that there is no announcement. Please refer to exchange comparison for hosting and fee models of each major platform.

Before selling anything, record the date of purchase and price. Because the acquisition date of the old currency is passed on to the new currency, and the acquisition cost is apportioned based on the market price, your record determines the tax burden. For common procedures, please refer to Comparison of Tax Tools.

(As of August 20, 2026. This article does not constitute investment advice. Price and fee structures are subject to change; please confirm terms with your provider before purchasing.)