Key Takeaways
Bitcoin Cash (BCH) is a peer-to-peer electronic cash system created in August 2017 as a hard fork of Bitcoin, designed for increased scalability and lower transaction fees.
BCH increases the block size limit to 32 MB (vs. Bitcoin's 1 MB), enabling faster confirmations and lower transaction fees suitable for everyday payments.
Bitcoin Cash uses a Proof of Work consensus mechanism and shares Bitcoin's 21 million coin supply cap and roughly four-year halving schedule.
The May 2026 Layla upgrade introduces bounded loops, reusable functions, and pay-to-script capabilities, expanding smart contract support and payment efficiency.
Introduction
Bitcoin Cash (BCH) is one of several cryptocurrencies that emerged from Bitcoin's technical and philosophical differences regarding scalability. Its architectural choice of increasing on-chain transaction capacity through larger blocks and protocol enhancements reflects different trade-offs between decentralization, security, and throughput. This makes it suitable for users prioritizing payment speed and low fees.
Why Bitcoin Cash Was Created
In 2017, Bitcoin faced network congestion, with long transaction confirmation times and rising transaction fees detracting from its original vision of near-instant payments with minimal costs. This prompted a significant debate within the Bitcoin community about increasing the block size limit to improve scalability.
Bitcoin's decentralized nature means proposed protocol changes require widespread agreement among network nodes. Since reaching consensus on major changes can be challenging, the debate intensified over whether to increase the block size or pursue alternative scaling solutions.
A group of developers, investors, entrepreneurs, and miners who believed that increasing the block size was the most appropriate response created Bitcoin Cash in August 2017. The BCH community contends that this approach better aligns with Satoshi Nakamoto's original proposal of a peer-to-peer electronic currency, offering a faster and cheaper payment system potentially more suitable than Bitcoin for routine transactions.
The Bitcoin Cash hard fork was supported by several notable figures in the blockchain industry, including Jihan Wu (co-founder of Bitmain) and Roger Ver (CEO of Bitcoin.com).
The SegWit Alternative
Shortly after the Bitcoin Cash fork, Bitcoin implemented a technology called SegWit (Segregated Witness), which was developed in 2015 by Bitcoin developer Pieter Wuille. SegWit addresses network congestion and scalability issues by optimizing how transaction data is stored, effectively increasing transaction throughput without raising the block size limit.
Bitcoin Cash proponents argued that SegWit was an inferior alternative to increasing the block size, contending that larger blocks remain the more straightforward path to achieving peer-to-peer electronic cash functionality.
Technical Architecture
How Bitcoin Cash works
Bitcoin Cash was forked directly from the original Bitcoin source code, so both networks share fundamental similarities. Both use a Proof of Work consensus mechanism and are open for anyone to join and contribute. Additionally, any address that held Bitcoin prior to the fork received an equal amount of BCH after the split, with the same address string operating on different networks.
Like Bitcoin, BCH has a target block time of 10 minutes and a maximum supply of 21 million coins. The emission rate halves every 210,000 blocks, roughly every four years. As of 2024, the current block reward is 3.125 BCH per block (reduced from 6.25 BCH following the April 2024 halving).
Block size and transaction capacity
The most significant technical difference is BCH's increased block size limit. Initially raised from 1 MB to 8 MB, the limit was further increased to 32 MB in 2018, allowing more transactions to fit in each block. Then, in 2024, BCH activated the Adaptive Block Limit Algorithm. This means block size now starts from a guaranteed minimum of 32 MBs and can increase or decrease according to real network traffic.
Difficulty adjustment
Bitcoin Cash and Bitcoin both adjust mining difficulty through difficulty adjustment algorithms (DAA). However, Bitcoin adjusts every 2,016 blocks, while Bitcoin Cash adjusts its difficulty after each block. This more frequent adjustment can potentially incentivize or discourage miners more dynamically based on network conditions. BCH previously implemented an emergency difficulty adjustment (EDA) to encourage miners to join the network, but it was later removed due to instabilities.
Key technology upgrades
In 2019, Bitcoin Cash implemented Schnorr Signatures, an alternative digital signature algorithm that offers improvements in privacy and scalability compared to Bitcoin's Elliptic Curve Digital Signature Algorithm (ECDSA) scheme. More recently, BCH added support for CashTokens, enabling on-chain token issuance and programmability. Looking ahead, the May 2026 Layla network upgrade will introduce bounded loops and reusable functions, further expanding smart contract capabilities and making BCH suitable for decentralized finance and complex on-chain tools.
Bitcoin Cash vs. Bitcoin
Both Bitcoin and Bitcoin Cash operate on similar foundational principles but diverge in philosophy and technical approach. Bitcoin Cash emphasizes on-chain scalability through larger blocks and protocol upgrades, positioning itself as better suited for everyday peer-to-peer transactions. However, larger blocks increase storage and bandwidth requirements, which can reduce the number of full nodes the network can support. Meanwhile, Bitcoin prioritizes decentralization and security by maintaining smaller block sizes and pursuing Layer 2 scaling solutions like the Lightning Network. This approach reduces the computational burden on network participants, potentially lowering centralization risks.
Use Cases and Adoption
Day to day payments
The Bitcoin Cash community promotes BCH as money designed for everyday use. Adoption occurs through platforms such as Shopify (e-commerce) and TravelByBit (travel payments), though merchant acceptance remains steady rather than widespread.
Storing Bitcoin Cash
Bitcoin Cash can be stored in hardware wallets (Ledger, Trezor, Cobo Vault), software wallets (Trust Wallet, Electrum Cash, Coinomi), and web wallets. It is essential to remember that Bitcoin and Bitcoin Cash operate on separate blockchains, so sending Bitcoin to a BCH address or vice versa will result in permanent loss of funds.
FAQ
What is the relationship between Bitcoin and Bitcoin Cash?
Bitcoin Cash is a hard fork of Bitcoin created in August 2017. It shares Bitcoin's source code and many technical features, but diverges in its focus on on-chain scalability through larger block sizes and faster block times.
Why would someone choose Bitcoin Cash over Bitcoin?
BCH can potentially offer lower transaction fees and faster confirmation times due to larger blocks, making it potentially more suitable for frequent payments. However, Bitcoin maintains greater network effects, security reputation, and market liquidity.
What is the May 2026 Layla upgrade?
The Layla upgrade activates bounded loops and reusable functions for smart contracts, bitwise operations for cryptography, and adaptive block sizing to maintain low fees as demand grows. This expansion of on-chain programmability aims to position Bitcoin Cash for decentralized finance applications.
Does Bitcoin Cash have smart contract support?
Yes, Bitcoin Cash has progressively added smart contract capabilities. With CashTokens (enabling token issuance) and the upcoming Layla upgrade (enabling loops and functions), BCH supports increasingly sophisticated on-chain programs, though it remains less feature-rich than dedicated smart contract blockchains.
Is Bitcoin Cash widely accepted by merchants?
Merchant acceptance of Bitcoin Cash has remained steady through payment processors and e-commerce platforms, but it is not yet widespread. Adoption is growing more slowly than stablecoins, which have gained considerable traction in emerging markets for everyday transactions.
Closing Thoughts
Bitcoin Cash demonstrates that scaling blockchain networks through larger blocks remains a viable alternative to off-chain solutions, with steady adoption among merchants and payment processors. Its continuous upgrades show its community's commitment to building a practical payments network with smart contract capabilities.
Further Reading
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