The Architecture
By May 2018, Bitcoin Cash (BCH) had established itself as the most prominent alternative vision for scaling a blockchain network. Born from the August 2017 hard fork of Bitcoin, BCH’s core architectural distinction was deceptively simple: a larger block size limit of 8 megabytes compared to Bitcoin’s 1 megabyte cap. The philosophy behind this design choice was straightforward — increase on-chain capacity to accommodate more transactions per block, keep fees low, and preserve the peer-to-peer electronic cash vision outlined in Satoshi Nakamoto’s original whitepaper.
At the Satoshi’s Vision Conference held in Tokyo earlier in 2018, Bitcoin Cash developers and advocates had laid out their technical roadmap with growing confidence. Bitcoin Unlimited’s Peter Rizun and Andrew Stone presented research on scaling capacity, while Bitcoin ABC’s lead developer Amaury Sechet outlined the client’s evolution. The conference drew significant attention as the largest bitcoin-centric event ever held in Tokyo, with SBI Holdings subsidiary SBI Bits president Jerry Chan opening proceedings with a vision of making BCH the best money in the world. The architecture wasn’t just theoretical — it was being actively deployed, tested, and debated.
BCH’s block structure diverged from Bitcoin Core in several key ways beyond raw size. The adjustable block size cap meant that miners could theoretically vote to increase capacity further. Transaction ordering rules were modified to improve performance. The network’s difficulty adjustment algorithm had been redesigned to respond more rapidly to hashrate changes — a critical consideration for a chain that shared SHA-256 mining hardware with the larger Bitcoin network. As of May 5, 2018, BCH was trading at $1,752 on CoinMarketCap, with a market capitalization of nearly $30 billion, making it the fourth-largest cryptocurrency behind Bitcoin, Ethereum, and XRP.
Consensus Mechanisms
Both Bitcoin and Bitcoin Cash shared the same proof-of-work consensus mechanism — SHA-256 hash functions solved by miners competing for block rewards. But the fork had created a fascinating economic experiment in how shared mining infrastructure interacts with competing chains. Because BCH used the same mining algorithm as BTC, miners could dynamically allocate hashrate between the two networks based on profitability. When BCH became more profitable to mine relative to BTC, miners would switch, causing rapid hashrate fluctuations on both chains.
This dynamic exposed a critical infrastructure vulnerability. BCH’s emergency difficulty adjustment algorithm (DAA), implemented at launch, was designed to prevent the chain from becoming unmineable if hashrate dropped precipitously. However, the original implementation was overly responsive — difficulty would sometimes drop dramatically, allowing miners to produce blocks at extremely high rates before switching back to BTC. This created unpredictable block times and, in some cases, allowed opportunistic miners to exploit the oscillating difficulty for outsized profits. By late 2017 and early 2018, BCH had implemented an improved DAA designed to stabilize block production times closer to the target of 10 minutes per block.
The consensus layer also carried deeper philosophical implications. Bitcoin Cash proponents argued that Bitcoin Core’s decision to maintain the 1MB block size and pursue second-layer scaling solutions like the Lightning Network represented a fundamental departure from Nakamoto’s original design. BCH supporters, including high-profile figures like Roger Ver and nChain’s Craig Wright, insisted that on-chain scaling was not merely a technical preference but an ideological commitment to keeping the base layer accessible and inexpensive for everyday transactions. This philosophical divide shaped infrastructure decisions at every level — from protocol design to node deployment to community governance.
Network Health
As of early May 2018, Bitcoin Cash’s network health presented a mixed picture. On the positive side, the chain was actively processing transactions with fees significantly lower than Bitcoin’s, which had experienced dramatic fee spikes in late 2017 — at one point reaching average fees of over $50 per transaction. BCH’s larger blocks meant that the mempool rarely backed up, keeping transaction costs predictably low. For users in regions where even small fees represented a significant barrier, this was a meaningful advantage.
However, the network faced notable challenges. Node count was a persistent concern. Running a BCH node with 8MB blocks required substantially more storage and bandwidth than a Bitcoin Core node. While this was an intentional trade-off — BCH proponents argued that modern hardware made larger blocks entirely feasible — critics warned that increasing resource requirements would centralize the network among fewer node operators. Data on actual node counts was difficult to verify precisely, but independent estimates suggested BCH had significantly fewer reachable nodes than Bitcoin, raising questions about the network’s resilience and censorship resistance.
Hashrate distribution was another concern. BCH’s total hashrate was a fraction of Bitcoin’s, making it theoretically more vulnerable to a 51% attack. The shared SHA-256 mining ecosystem meant that a coordinated effort by a large BTC mining pool could potentially disrupt the BCH chain, though economic disincentives made such an attack unlikely. Kraken’s market report for May 5 showed BCH trading at $1,670.54 with a 10.5% daily gain — one of the strongest performers that day — suggesting continued market confidence despite the infrastructure concerns.
Developer Ecosystem
Bitcoin Cash’s developer ecosystem in May 2018 was vibrant but fragmented. Multiple independent client implementations were being developed in parallel — Bitcoin ABC, Bitcoin Unlimited, Bitcoin XT, and others — each with slightly different approaches to protocol governance. This diversity was presented as a strength, reducing the risk of a single point of failure in development. However, it also introduced coordination challenges, particularly when hard fork upgrades needed to be scheduled and executed in sync across implementations.
The ecosystem was also attracting institutional interest. SBI Holdings, one of Japan’s largest financial conglomerates, had publicly backed Bitcoin Cash and was building infrastructure through SBI Bits. Coinbase had integrated BCH trading, with engineer Josh Ellithorpe detailing the intricate steps required for smooth integration at the Satoshi’s Vision Conference. Projects like Yours.org, a content platform built by Ryan X Charles that paid creators in BCH, demonstrated real-world application development. OpenBazaar developer Chris Pacia presented work on building a decentralized marketplace using BCH infrastructure.
Yet the developer community was already showing signs of the internal tensions that would later split the chain again. Craig Wright’s nChain group was pushing for a more aggressive on-chain scaling approach, including removing the block size cap entirely and making other protocol changes that other developers viewed as premature or risky. The Colored Coins panel at Satoshi’s Vision highlighted another emerging debate — whether BCH should support token issuance natively, a feature that could expand utility but also increase complexity. These debates, still cordial in early 2018, would escalate dramatically by November, when the chain would undergo another contentious hard fork producing Bitcoin SV.
Final Assessment
Bitcoin Cash in May 2018 occupied a unique position in the cryptocurrency landscape. Its infrastructure was functional and actively improving, with genuine institutional backing and a passionate developer community building real applications. The larger block size was delivering on its core promise of lower transaction fees, and the network was processing meaningful transaction volume. BCH’s price at $1,752 and market cap near $30 billion reflected significant market confidence. However, the infrastructure faced real challenges: lower node counts than BTC, potential hashrate vulnerability, and a developer community that was already fracturing along ideological lines. The coming months would test whether BCH’s approach to on-chain scaling could sustain both technical performance and community cohesion — questions that the November 2018 hard fork would answer in dramatic fashion.
Disclaimer: This article is for informational purposes only and does not constitute financial, legal, or investment advice. Cryptocurrency investments carry significant risk, including the potential for total loss of capital. Readers should consult qualified professionals before making investment decisions. Past performance does not guarantee future results.
8MB blocks and BCH still couldnt get meaningful adoption beyond a few payment processors. the tech was never the problem
adoption was the problem because nobody wanted to use a chain where 3 people controlled the mining. BCH had tech talent but zero decentralization cred after the hash wars
8MB blocks and BCH still lost to Lightning. scaling without users is just empty capacity
Peter Rizun presented actual research at that Tokyo conference. Say what you want about BCH but the scaling work was legit, just got buried under the drama
SBI Bits opening the conference was a big deal at the time. Japanese institutional money was genuinely interested in BCH as a payment rail
bigblockmaxi is right, Rizuns work on graphene and xthinner was genuinely innovative. shame it all got buried under the CSW drama
the CSW stuff was noise but the real damage was nChain trying to patent every scaling solution. killed open collaboration
the real tragedy was Amaury Sechet burning out. dude carried Bitcoin ABC for years then ragequit in 2020 and forked to eCash. BCH never recovered