The Bitcoin Cash network, originally created as a "big block" alternative to Bitcoin during its 2017 hard fork, underwent another major split just last week—dividing into two distinct blockchains: Bitcoin Cash ABC (BCHABC) and Bitcoin Cash SV (BCHSV). Now, one week after the split, the dust is beginning to settle, but tensions remain high. While BCHABC has emerged as the dominant chain in terms of hash power and market value, the conflict is far from over.
This article explores the current state of both chains, the strategic moves made by their respective supporters, and what this means for the future of decentralized networks, mining economics, and blockchain governance.
The Hash War That Wasn’t—And the Endurance Attack That Is
Many predicted an all-out hash war immediately following the split, especially after Craig Steven Wright, chief scientist at nChain and leading figure behind Bitcoin SV, publicly declared his intent to attack the competing chain. However, no direct 51% attacks have materialized—at least not yet.
Instead, what’s unfolding is better described as an endurance attack, also referred to as "persistence hunting." Rather than launching a sudden takeover, the strategy involves outlasting the opposition by maintaining sustained mining pressure over time. The goal? To make it economically unsustainable for the other side to continue securing its blockchain.
Bitcoin Cash ABC has so far held the lead in hash power, allowing it to mine blocks faster and maintain network security. Yet this advantage comes at a steep cost. Unusually high levels of mining power have been directed toward BCHABC—not because it’s the most profitable coin to mine based on block rewards, but due to strategic investment by its backers.
According to estimates from BitMEX Research, millions of dollars have already been spent by both factions in this ongoing hash race. While Bitcoin Cash SV has also attracted significant mining support, it hasn’t faced the same level of retaliatory threats—making its position more stable for now.
Interestingly, there’s no technical necessity for BCHABC to maintain its hash power lead. Both chains are now fully independent. Even if BCHSV were to overtake BCHABC in cumulative proof-of-work, both would continue functioning normally—though public perception and brand legitimacy would likely shift.
Checkpoint Controversy: Security vs. Centralization
In response to potential reorganization (reorg) attacks, the Bitcoin ABC development team introduced a checkpointing mechanism in their latest software update. This change prevents blockchain reorganizations deeper than 10 blocks. Once a transaction receives 10 confirmations, it’s considered irreversible by Bitcoin ABC nodes—even if a longer, valid alternative chain emerges.
While intended to protect against malicious reorgs, this move has sparked controversy within the crypto community. Critics argue that such checkpoints introduce centralized control, undermining one of blockchain’s core principles: decentralization.
The new rule creates new attack vectors. For instance, a well-timed release of a longer alternative chain could cause a chain split if not all users upgrade to support the checkpoint rule. This might result in two versions of BCHABC—one that follows the checkpoint and one that doesn’t—effectively creating two separate currencies.
Furthermore, this protocol change was implemented unilaterally by the Bitcoin ABC team without coordination with other development groups like Bitcoin Unlimited. This lack of consensus raises concerns about centralized governance and increases the risk of network fragmentation.
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Calvin Ayre Steps Into the Spotlight
One of the most influential figures backing Bitcoin Cash SV is Calvin Ayre, billionaire founder of CoinGeek and a long-time advocate for large-block Bitcoin. In the days following the split, Ayre escalated his involvement beyond financial support.
He publicly accused key figures in the BCHABC camp—including Bitmain’s Jihan Wu, Bitcoin ABC lead developer Amaury Séchet, Roger Ver of bitcoin.com, and Kraken’s Jesse Powell—of market manipulation through alleged collusion. Ayre claimed to possess documents proving these claims, though no concrete evidence has been released.
Additionally, Ayre extended a peace offering: if BCHABC implements replay protection—a technical feature that prevents transactions on one chain from being duplicated on the other—he would cease hostilities. Replay protection would allow users to safely transact on either chain without accidentally spending coins on both.
However, implementing replay protection now poses risks. If not all users adopt the update, it could trigger another hard fork within the BCHABC network—splitting it further into “with replay protection” and “without” versions.
Market Impact and Chain Adoption
Despite the technical and ideological battles, both BCHABC and BCHSV are establishing themselves as independent cryptocurrencies. Exchanges and wallet providers are gradually adopting distinct naming conventions and ticker symbols:
- BCHABC is widely recognized as the continuation of “Bitcoin Cash” on most platforms.
- BCHSV is gaining traction with dedicated tools like block explorers (e.g., bchsvexplorer.com) and growing miner support.
Notably, BCHSV has already mined several blocks exceeding 32 megabytes, showcasing its commitment to large-block scalability—a core tenet of its vision. However, these large blocks have led to propagation delays and node synchronization issues, highlighting practical challenges in scaling.
Price Performance Post-Split
Market sentiment has taken a hit. One week before the split, Bitcoin Cash traded around $600. After the split:
- BCHABC trades at approximately $195
- BCHSV trades at around $45
Combined, they represent roughly $240 in value—marking a nearly 60% decline in total market capitalization.
The broader crypto market also dipped during this period, suggesting that uncertainty around the hash war contributed to investor anxiety and widespread selling.
Still, BCHABC retains its place among top cryptocurrencies, currently holding the fourth position on major ranking sites—previously occupied by pre-split BCH. BCHSV is climbing fast and could soon enter the top 15.
Frequently Asked Questions (FAQ)
Q: What caused the Bitcoin Cash split?
A: The split resulted from ideological differences over protocol development. The Bitcoin Cash ABC faction favored gradual upgrades and smart contract capabilities, while Bitcoin Cash SV aimed to restore Satoshi Nakamoto’s original vision with massive block sizes.
Q: Is one chain more secure than the other?
A: Currently, BCHABC has stronger hash power, making it more resistant to 51% attacks. However, security depends on sustained miner participation and economic incentives.
Q: Can I use my old Bitcoin Cash wallet for both chains?
A: Yes—but without replay protection, transactions on one chain may be mirrored on the other. It’s crucial to use updated wallets or services that support chain separation.
Q: Which chain is considered “real” Bitcoin Cash?
A: There’s no official answer. Most infrastructure defaults to BCHABC as Bitcoin Cash, but supporters of BCHSV believe it better represents the original project’s goals.
Q: Will there be more forks in the future?
A: Possibly. If consensus cannot be reached on key upgrades—or if replay protection is implemented—it could trigger further splits.
Q: How do I buy BCHABC or BCHSV?
A: Major exchanges list both tokens under various tickers (e.g., BCH for ABC; BSV for SV). Always verify which asset you're purchasing before trading.
Core Keywords
Bitcoin Cash split, BCHABC vs BCHSV, hard fork 2025, endurance attack, blockchain checkpointing, replay protection, hash power race
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