Famous Bitcoin Forks: Bitcoin Cash, Bitcoin SV, and What They Changed

When Bitcoin launched in 2009, no one knew exactly how it would evolve. But within a decade, it had already split into multiple versions - not because of bugs or hacks, but because people fundamentally disagreed about what Bitcoin should be. Two of the most famous forks - Bitcoin Cash (BCH) and Bitcoin SV (BSV) - weren’t just technical upgrades. They were ideological battles fought in code.

Why Bitcoin Forked in the First Place

Bitcoin’s original design limited each block to 1 megabyte. That meant the network could only process about 7 transactions per second. As adoption grew, transaction fees spiked and confirmation times dragged. By 2017, the network was clogged. Some users paid over $50 just to send a few dollars worth of Bitcoin. Others couldn’t get their transactions confirmed for days.

The core team, led by developers like Wladimir van der Laan, believed Bitcoin should stay small and secure. Their solution? Move most transactions off-chain using the Lightning Network. But a growing group of miners, traders, and entrepreneurs thought that was wrong. They believed Bitcoin was meant to be digital cash - something you could use at a coffee shop, not just a store of value. To them, the solution was simple: make blocks bigger.

This wasn’t a minor disagreement. It was a split in philosophy. One side wanted Bitcoin to be a settlement layer - a secure backbone for other systems. The other wanted it to be a payment network for everyday people.

Bitcoin Cash: The First Major Fork

On August 1, 2017, Bitcoin Cash was born. It took the existing Bitcoin blockchain and doubled the block size from 1 MB to 8 MB - then later raised it to 32 MB. That meant each block could hold over 200 times more transactions than Bitcoin’s original limit.

The change was immediate. Fees dropped. Transactions confirmed in seconds. Merchants who had avoided Bitcoin because of slow payments started accepting it again. By late 2017, Bitcoin Cash was trading at over $1,000, and its network hash rate climbed to over 4 exahashes per second.

But Bitcoin Cash didn’t just change the block size. It also removed SegWit - the upgrade Bitcoin Core had adopted to squeeze more transactions into each block. BCH developers saw SegWit as a band-aid. They wanted a real fix: more space on-chain.

By 2019, Bitcoin Cash was processing an average of 100,000 transactions per day. Its median transaction value hovered between $1 and $10 - close to what you’d expect from a payment system. Daily adjusted transfer value peaked at $325.5 million in June 2019. That’s impressive for a fork - but still less than 10% of Bitcoin’s $3.58 billion daily volume.

Bitcoin SV: The Fork That Went Further

Bitcoin Cash didn’t stay unified for long. In November 2018, another group split off - this time from Bitcoin Cash itself. They called their new coin Bitcoin SV, short for Bitcoin Satoshi Vision.

Their argument? Bitcoin Cash hadn’t gone far enough. The 32 MB block limit was still too small. Bitcoin SV raised it to 128 MB - and removed any hard cap, meaning blocks could theoretically grow to over 100 MB. They also removed limits on OP_RETURN, a part of Bitcoin’s scripting language that lets users store data on the blockchain. Suddenly, you could store documents, images, even entire databases directly on the BSV chain.

This wasn’t just about payments. Bitcoin SV’s backers, led by Craig Wright (who claims to be Satoshi Nakamoto), wanted to turn Bitcoin into a global data ledger. They pitched it as the foundation for enterprise applications - supply chain tracking, digital contracts, real-time data feeds.

But there was a cost. The larger blocks meant node operators needed more storage, bandwidth, and computing power. Most home users couldn’t run a full node anymore. That raised concerns about centralization. If only big companies could afford to validate transactions, who really controlled the network?

The fork triggered a mining war. Miners who used the same hardware to mine Bitcoin, BCH, and BSV suddenly had to choose sides. In the first week after the split, Bitcoin Cash’s hash rate jumped from 4 exahashes to 7.8 exahashes. Miners lost millions - $3.45 million on BCH, $2.49 million on BSV - as they scrambled to mine the more profitable chain.

By mid-2019, the dust settled. Bitcoin Cash held 2.13 exahashes of hash power. Bitcoin SV? Just 447 petahashes - less than 5% of BCH’s strength. That’s a huge security gap. Bitcoin’s hash rate is over 700 exahashes. BCH is secure. BSV? It’s vulnerable.

What Happened to Transaction Volume?

Bitcoin SV had a flashy start. On November 18, 2018, just three days after launch, it hit 4 million transactions in a single day. That’s more than Bitcoin processed in a week. But then it crashed. Daily transactions settled into a pattern of 10,000 on average, with occasional spikes up to 450,000.

Why? Because most of those spikes weren’t payments. They were data dumps. A single BSV block on December 12, 2018, contained over 100,000 OP_RETURN transactions - all storing text, images, and files. The median transaction value dropped to $0 on multiple days. That’s not a payment system. That’s a public bulletin board.

Bitcoin Cash, by contrast, kept its focus on payments. Its median transaction value stayed between $1 and $10. Daily transaction volume stayed steady. It didn’t chase headlines. It just worked.

Security, Centralization, and the Real Cost of Bigger Blocks

Bigger blocks sound great - until you think about who runs the network.

Bitcoin has over 15,000 full nodes worldwide. Anyone with a decent internet connection and a few hundred dollars can run one. That’s decentralization.

Bitcoin Cash has about 2,000 nodes. Still decent. But Bitcoin SV? Less than 200. Most are operated by a handful of companies tied to the BSV foundation. That’s not a decentralized network. It’s a private club.

And here’s the thing: security isn’t just about math. It’s about how many people are watching. Bitcoin’s massive hash rate makes 51% attacks nearly impossible. BCH is safe enough. BSV? With less than 1% of Bitcoin’s hash power, it’s theoretically vulnerable. A well-funded attacker could take control.

The BSV team argues that enterprise clients will pay for secure nodes. But no major corporation has adopted it at scale. Not Apple. Not Visa. Not Amazon. The only real users are speculators and data hoarders.

Why Bitcoin Still Dominates

Bitcoin Cash and Bitcoin SV both wanted to be the digital cash Bitcoin was meant to be. But neither replaced Bitcoin.

Why? Because Bitcoin’s brand, liquidity, and security are unmatched. Over 85% of all on-chain transaction value in June 2019 came from Bitcoin. Not BCH. Not BSV.

BCH has a loyal user base. It’s traded on Coinbase, Kraken, and Bitstamp. It’s accepted by some merchants. It’s stable. It works.

BSV? It’s a fringe project. Its development is tied to one controversial figure. Its community is small. Its economic activity is erratic. It’s more of a political statement than a currency.

The truth? Bitcoin’s design - small blocks, off-chain scaling - has held up. The Lightning Network now handles millions of transactions daily. Fees are under $0.10. Speed is near-instant.

The forks didn’t fix Bitcoin. They showed how hard it is to change something so widely used. And they proved that when communities split, the original often wins.

What’s Left Today?

As of 2026, Bitcoin Cash still trades as the 15th-largest cryptocurrency. It has active development. New features like CashTokens are being tested. It’s not booming, but it’s alive.

Bitcoin SV? Its market cap is less than 1% of Bitcoin’s. Its developers have mostly gone quiet. Its website still claims it will "replace every payment system in the world," but no one outside its inner circle believes it.

The lesson? Blockchain forks aren’t just technical experiments. They’re social ones. And in the end, adoption wins over ideology.