The cryptocurrency market is reeling from one of the most divisive hard forks in its short history. On November 15, Bitcoin Cash — itself a 2017 breakaway from Bitcoin — fractured into two competing chains: BCH ABC and BCH SV. Three days later, the so-called “hash war” shows no signs of resolution, and the broader market is paying the price.
TL;DR
- Bitcoin Cash split into BCH ABC and BCH SV after a contentious November 15 hard fork
- ABC is backed by Bitmain co-founder Jihan Wu; SV is championed by Craig Wright and CoinGeek
- Neither side implemented replay protection, putting user funds at risk
- BCH SV is losing the hash war, with ABC maintaining a higher hashrate
- The conflict contributed to a sharp sell-off across the broader crypto market
Two Visions, One Blockchain
The roots of the split lie in fundamentally different visions for Bitcoin Cash’s future. BCH ABC, which stands for Adjustable Blocksize Cap, wants to maintain the current 32 MB block size while introducing new opcodes that would allow the blockchain to interact with external data. It is widely seen as the continuation of the original BCH protocol and is supported by Bitmain, the world’s largest cryptocurrency mining equipment manufacturer.
BCH SV, short for Satoshi’s Vision, takes a more purist approach. Backed by CoinGeek — one of the largest BCH mining pools — and driven by Craig Wright, SV aims to increase the block size to 128 MB and re-enable certain opcodes from the original Bitcoin whitepaper that were previously disabled over security concerns. SV also proposes removing the cap on the number of script instructions that can be executed in a single transaction.
A Fight to the Death
What makes this fork particularly unusual is the openly hostile rhetoric from both camps. Craig Wright declared on social media that he would engage in “continuous competition until one dies as we do not stop.” Jihan Wu, Bitmain’s co-founder, responded with equal ferocity: “I have no intention to start a hash war with Craig Wright, because if I do… BTC price will dump below yearly support… But since Craig Wright is relentless, I am all in to fight till death!”
By November 18, on-chain data from Coin.dance showed BCH ABC maintaining a meaningful advantage in accumulated proof of work, suggesting that SV was losing the technical battle despite its aggressive posture.
No Replay Protection, Real Consequences
Perhaps the most concerning aspect of the fork for ordinary users is the complete absence of replay protection. Because both chains claim to be the legitimate successor to Bitcoin Cash, neither side was willing to implement safeguards that would prevent transactions from being duplicated across both networks. This means any transaction valid on one chain is also valid on the other — creating the potential for replay attacks that could drain funds unintentionally.
Third-party solutions have emerged, including tools from major exchanges, but the lack of native protection at the protocol level has added a layer of uncertainty for anyone holding BCH.
Market Fallout
The timing could hardly be worse. Bitcoin was already trading near its lowest levels of the year at roughly $5,600, and the hash war has amplified bearish sentiment across the board. Ethereum sat at approximately $177, and the total cryptocurrency market cap has shed billions in the weeks leading up to and following the fork. Analysts have pointed to the Bitcoin Cash conflict as a key catalyst for the broader downturn, as uncertainty around hash rate redistribution and miner economics spooked investors already on edge.
Why This Matters
The Bitcoin Cash hash war is more than an intra-community squabble — it is a stress test for how decentralized networks resolve existential governance disputes. When billion-dollar interests collide and both sides would rather burn resources than compromise, the entire ecosystem feels the heat. For traders and investors, it is a reminder that technical risk and political risk are inseparable in crypto. The outcome of this war — whether ABC prevails definitively, or SV continues siphoning hash rate — will shape how future disputes are handled across every major blockchain.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Cryptocurrency markets are highly volatile. Always conduct your own research before making investment decisions.