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Bitcoin Cash (BCH) is the clearest example of a lasting Bitcoin hard fork and the most prominent one in the available overview. Other notable fork assets are Bitcoin Gold (BTG), Bitcoin SV (BSV), and eCash (XEC). “Popular” has no single answer without a metric: the available status descriptions are qualitative, dated August 2026, and do not provide a comparable live ranking by trading volume, users, market value, or search interest.
What counts as a Bitcoin fork?
In everyday cryptocurrency discussion, “fork” can mean a proposed software change, an alternative client, an upgrade to an existing network, or a lasting split that leaves separate blockchains and assets. Those are different outcomes.
A hard fork changes consensus rules incompatibly: nodes following the old rules may reject blocks accepted under the new rules. If both rule sets continue to be used, the chains can diverge after sharing a history up to the split. A soft fork tightens rules in a backward-compatible way. Bitcoin Core describes Segregated Witness (SegWit) as a soft-fork upgrade; it did not create a separate Bitcoin asset.
Bitcoin XT, Bitcoin Classic, and Bitcoin Unlimited were alternative software efforts during the block-size debate, but the cited overview says they did not gain enough support to activate their proposals. SegWit2x was a planned hard fork that was cancelled before launch. Neither proposals nor client software by themselves constitute a lasting, separate coin.
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Which Bitcoin forks are the most notable?
The table distinguishes direct splits from forks that branched off another Bitcoin-related chain. Status labels reflect Bitcoin.com’s overview as of August 2026, not a real-time check of activity or exchange listings.
| Project | Lineage and date | Motivation or change | Status reported in August 2026 |
|---|---|---|---|
| Bitcoin Cash (BCH) | Split directly from Bitcoin on August 1, 2017, at block 478,558 | Block-size increase amid disagreement about on-chain scaling; the overview says the initial limit was 8 MB and later became 32 MB. | Active; the overview describes it as the most widely traded and supported Bitcoin hard fork. |
| Bitcoin Gold (BTG) | Split directly from Bitcoin on October 24, 2017, at block 491,407 | Changed the proof-of-work mining algorithm to Equihash, with the aim of enabling GPU mining. | Active but marginal; the overview reports 51% attacks in 2018 and 2020. |
| Bitcoin Diamond (BCD) | Split directly from Bitcoin on November 24, 2017, at block 495,866 | The overview lists a tenfold supply increase and faster blocks. | Largely inactive. |
| Bitcoin SV (BSV) | Split from Bitcoin Cash on November 15, 2018, at block 556,766 | A dispute over protocol direction; it adopted a “Satoshi Vision” identity and promoted larger blocks. | Active; the overview says it had been delisted from several major exchanges since 2019. |
| eCash (XEC) | Split from the Bitcoin ABC/BCH chain on November 15, 2020 | The overview describes it as Bitcoin ABC’s chain, with a development fund in mining rewards. | Active but small. |
| SegWit2x (B2X) | Planned for November 2017; did not launch | Proposed a 2 MB block-size hard fork after SegWit. | Cancelled on November 8, 2017. |
Dates, block heights, design summaries, and status descriptions in this table come from Bitcoin.com’s Bitcoin forks overview. Its August 2026 status snapshot is not a live market or activity ranking.
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Why did Bitcoin split into separate chains?
The block-size disagreement
The split that created Bitcoin Cash followed a dispute about how to scale Bitcoin. Supporters of larger blocks argued that increasing the number of transactions handled on the base layer would help accommodate use. Opponents warned that larger blocks could raise the demands of operating a full node and favored SegWit and second-layer approaches instead. The disagreement was about competing scaling approaches; the existence of separate chains does not establish that one approach “won” technically.
Proposals and upgrades are not all chain splits
The Bitcoin Improvement Proposal index helps separate an idea from a deployed rule change. BIP 101, “Increase maximum block size,” is marked closed; BIP 141, “Segregated Witness (Consensus layer),” is marked deployed; BIP 50 documents the March 2013 chain fork; and BIP 99, on the motivation and deployment of consensus rule changes, is marked closed. These statuses illustrate why a proposed change, a deployed upgrade, and a continuing independent chain should not be treated as interchangeable.
Sources: Bitcoin Improvement Proposals index and Bitcoin Core FAQ on SegWit and scaling.
How should you judge whether a fork is popular?
Popularity depends on what you want to measure. A coin may have trading activity but limited wallet support, or a recognizable name but little current network use. The cited overview uses qualitative labels; it does not supply a common dataset for ranking forks by market capitalization, volume, users, or search interest. Its “most widely traded and supported” description of BCH should therefore be read as that guide’s dated characterization, not as a current numerical comparison.
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- Lineage: Check whether a chain split directly from Bitcoin or from another fork. BSV, for example, branched from Bitcoin Cash, unlike BTG.
- Network activity and development: Look for dated, comparable evidence rather than inferring activity from a coin’s name or price.
- Exchange access: Verify current deposits, withdrawals, and trading separately. Listings can change, and the overview’s BSV delisting note dates from its August 2026 snapshot.
- Security history: Consider documented incidents, such as the BTG 51% attacks reported for 2018 and 2020.
- Wallet and custody support: Confirm support for the exact asset, network, and address format. A shared history does not guarantee that a wallet or custodian supports both resulting chains.
What BCH figures are available?
A 2026 Bitcoin Cash Trust SEC filing reports a fixed reward of 3.125 BCH per block at the time of its report and approximately 20.1 million BCH outstanding on June 30, 2026. It gives BCH a maximum supply of 21 million and says the reward halves every 210,000 blocks, with the next reduction expected in 2028. These are BCH-specific figures, not measurements for all Bitcoin forks.
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Do you get free coins when Bitcoin hard forks?
Not automatically in a simple or guaranteed way. Holding the private keys to coins at the time of a split can matter for access to assets on both chains, but actual access depends on the specific fork, wallet support, custody arrangements, and replay protection. A hosted exchange may control the keys and decide whether it supports a new asset; self-custody does not by itself make a claim process safe. Check the wallet provider’s and custodian’s instructions for that specific fork before moving funds or entering recovery information.
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