Bitcoin Forks Explained: What BTC, BCH, and BSV Actually Are

Search the word ‘Bitcoin’ on a crypto exchange and you will see a confusing list: Bitcoin (BTC). Bitcoin Cash (BCH). Bitcoin SV (BSV). Maybe Bitcoin Gold (BTG) for good measure. Each of them shares part of the name. Each of them has its own price. Only one of them is what people actually mean when they say ‘Bitcoin.’

This article is the plain-English explanation of where these forks came from, why they happened, and why the original Bitcoin (BTC) is the one that has overwhelmingly won out in the market. By the end you should never again wonder which of the ‘Bitcoins’ on an exchange page is the real one.

What a fork actually is

A fork happens when the people running the Bitcoin software disagree about the rules. Bitcoin is open-source software running on roughly 17,000 nodes. If a faction wants to change the rules — say, increase the maximum block size, or change a signature rule — they propose a new version of the software. If the network adopts the change, fine. If not, the dissenters can run their own version, and at the moment they do, the chain literally splits in two. Both versions share all the history up to the split. After the split, they are independent chains with independent rules.

That is a hard fork: a permanent, incompatible split. Each side keeps walking forward on its own ledger. The pre-fork coins exist on both ledgers, so anyone who held Bitcoin before the fork suddenly has the same balance on both chains.

There is also a milder version called a soft fork, where the rule change is backwards-compatible — old nodes still consider new blocks valid, and the chain stays unified. The Taproot upgrade in 2021 was a soft fork. Our piece on the Taproot upgrade covers the mechanics. Soft forks are not what people usually mean by ‘fork drama’ — they are quiet upgrades. The drama is always about hard forks.

Why Bitcoin Cash exists: the block size war

To understand 2017, you have to understand the argument that started in 2014.

Satoshi's original Bitcoin software had a 1 megabyte limit on the size of a block. At Bitcoin's tiny early scale, this was plenty. By 2014, with adoption growing, the network was starting to bump into the limit during high-traffic moments. Transactions backed up. Fees rose.

Two camps formed:

• Big-blockers wanted to raise the block size limit — to 2 MB, 8 MB, eventually 32 MB. Their argument: Bitcoin is supposed to be electronic cash, cash needs to handle lots of transactions, raise the limit and let the network grow.
• Small-blockers wanted to keep blocks small and instead build out scaling solutions in layers above Bitcoin — eventually leading to the Lightning Network. Their argument: bigger blocks centralize the network, because only well-funded operators could afford to run nodes large enough to keep up. Keep the base layer secure and slim, scale on top of it.

This argument was not abstract. It became fierce, technical, and personal over three years on online forums. By mid-2017 it was clear no consensus would be reached. On August 1, 2017, the big-block camp executed a hard fork: a new chain with 8 MB blocks called Bitcoin Cash (BCH) split off from the original. Bitcoin (BTC) kept its 1 MB blocks (later effectively expanded to ~4 MB through the SegWit soft fork). Anyone who held BTC before the fork now had identical balances of BTC and BCH.

How it played out: BTC won, BCH faded

At fork time, BCH had a real shot. Major exchanges listed it. Mining pools split. Some prominent voices — including some early Bitcoin developers — backed it. The expectation was that BCH would compete seriously and possibly overtake the original chain.

It did not. By 2018 the BCH price was about 10% of BTC's. By 2026 it is closer to 1%. Three reasons matter:

1. Network effects. Bitcoin's value comes from the people, exchanges, hardware wallets, custodians, miners, and merchants who use it. Forks copy the code but cannot copy the network. BTC kept the brand, the developers, the exchanges, and the liquidity. BCH had to rebuild it all from scratch and never closed the gap.
2. The Lightning Network worked. The small-blocker scaling thesis — build payment networks on top of Bitcoin instead of cramming transactions into the base layer — turned out to be technically sound. By 2020 Lightning was processing real volumes. The argument that Bitcoin needed bigger blocks to scale lost most of its weight. (Our piece on Lightning Network for beginners covers how this works.)
3. BCH itself fragmented further. In 2018, BCH had its own internal civil war and forked into Bitcoin Cash and Bitcoin SV (BSV). BSV split again. Each split shrank the credibility of the ‘true Bitcoin’ story. People who wanted Bitcoin gravitated back to the original.

The other forks: BSV, BTG, and the rest

After BCH, several smaller forks happened. None of them found durable demand. The notable ones:

• Bitcoin Gold (BTG) — forked October 2017, tried to use a different mining algorithm to allow consumer GPUs to mine. Suffered a series of 51% attacks in 2018–2020. Trades for pennies in 2026.
• Bitcoin SV (BSV) — forked from BCH in November 2018, championed by Craig Wright (who has falsely claimed to be Satoshi). Got delisted from major US exchanges in 2019 after Wright's behavior. Trades thinly.
• Bitcoin Diamond, Super Bitcoin, Bitcoin Private, Bitcoin Atom... — dozens of small forks happened in 2017–2018, mostly as cash grabs to distribute ‘free’ coins to BTC holders. Almost all are dead.

The pattern is consistent: forks copy the code and the ledger. They cannot copy the people, the developers, the exchange listings, the merchant adoption, the brand, and the perception of legitimacy. The original chain almost always retains those. The forks almost always wither.

How to recognize a fake ‘Bitcoin’ in 10 seconds

This matters because new beginners regularly get scammed into buying a fork token thinking it is ‘cheap Bitcoin.’ If you ever see something on an exchange or website claiming to be ‘Bitcoin’ for $200 or $50 or $5, here is the test:

1. Check the ticker. Real Bitcoin trades as BTC on every reputable exchange. Anything else — BCH, BSV, BTG — is a fork, not the original.
2. Check the price against the standard. Real Bitcoin's price is in five or six figures. If a token is being sold to you cheap because it is ‘the next Bitcoin’ or ‘Bitcoin before the run-up,’ it is a different asset entirely.
3. Check Coinbase and Kraken. If the major US-regulated exchanges have not listed it, that tells you something.

What about getting your fork coins?

If you held Bitcoin in self-custody before any of these forks, you technically own the fork coin too. Your seed phrase generates valid keys on both chains. Most people leave them alone — the dollar amount is usually trivial and claiming them carries privacy and security risks (you may end up exposing the same keys to a less-trusted chain). If you are curious, our primer on Bitcoin private keys walks through how the same keys work across forked chains. We do not recommend chasing fork coins for beginners. The expected value of the headache is greater than the expected value of the coins.

The shortest possible summary

1. A hard fork is a permanent, incompatible split in the Bitcoin network when one faction changes the rules.
2. The biggest fork was Bitcoin Cash (BCH) in August 2017, driven by a multi-year argument about block size.
3. BCH and its descendants (BSV, etc.) lost the network-effects fight to the original Bitcoin (BTC) and have faded steadily since.
4. The Lightning Network solved the scaling concern that drove the original split, mooting the central argument.
5. Real Bitcoin trades as BTC. Anything else with ‘Bitcoin’ in the name is a fork, not the original.

The lesson of the fork wars is that Bitcoin's value is in its people, not in its code. Anyone can copy the software in an afternoon. Nobody can copy the network. That is what makes Bitcoin durable, and that is what has decided every fork war since.