BCH · Layer-1 blockchain / peer-to-peer digital cash
A 2017 hard fork of Bitcoin that kept bigger blocks so everyday payments stay cheap and fast — now bolting on smart contracts.
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What is Bitcoin Cash?
Bitcoin Cash (BCH) is a cryptocurrency that split off from Bitcoin (BTC) on August 1, 2017. It was created by a faction of the Bitcoin community who wanted the network to be used mainly as everyday electronic cash — cheap, fast payments — rather than a store of value with high fees. They did this by raising the limit on how much data each block can hold, so more transactions fit and fees stay low.
The split happened because Bitcoin's 1 MB block-size limit was causing a backlog: as usage grew, transactions got slow and fees spiked. One camp wanted to keep blocks small and push scaling to separate 'layer-2' systems; the other wanted to just make the blocks bigger. When no compromise stuck, the big-block camp forked the code and the chain, and Bitcoin Cash was born. Everyone holding BTC at the fork received an equal amount of BCH.
There is no single founder. It was championed publicly by early Bitcoin figures like Roger Ver (nicknamed 'Bitcoin Jesus') and mining-hardware mogul Jihan Wu of Bitmain, and the initial reference software (Bitcoin ABC) was led by developer Amaury Séchet. Today development is spread across several independent node teams rather than one company.
Its pitch has always been 'be the cash Satoshi described.' In practice BCH works a lot like Bitcoin under the hood, but it optimizes for low-cost spending and, since 2023, has been adding programmable smart-contract features to broaden what the chain can do.
How it works
Bitcoin Cash uses the exact same core engine as Bitcoin: SHA-256 Proof-of-Work mining and the UTXO (unspent-transaction-output) accounting model. Miners around the world race to solve a hashing puzzle; the winner adds the next block of transactions roughly every 10 minutes and earns newly minted BCH plus fees. Nodes independently verify every transaction against the rules, so no central party is in charge.
The big difference from Bitcoin is capacity. BCH raised the block-size limit — from Bitcoin's 1 MB up to 32 MB — so far more transactions fit into each block. More room per block means the network rarely congests, which is why BCH fees are typically a fraction of a cent even when it's busy. The trade-off is that bigger blocks demand more bandwidth and storage from the nodes that run the network.
Since 2023, BCH has added real smart-contract capability through CashTokens and an expanding scripting language, letting developers build tokens, NFTs and on-chain apps directly on the base layer rather than on a separate chain. Recent yearly upgrades have steadily lifted old scripting limits to make these contracts more powerful.
Consensus: SHA-256 Proof-of-Work — same algorithm as Bitcoin, so BCH can be mined with Bitcoin ASIC hardware.
~10-minute block times and the same difficulty-adjusting, mining-based security model.
Block size up to 32 MB (vs Bitcoin's 1 MB base), the design choice that makes payments cheap and high-throughput.
UTXO model: your wallet spends discrete chunks of coin and creates change, just like Bitcoin.
Smart contracts via CashTokens + CashScript — tokens, NFTs and covenants live on the base chain, no separate layer-2 required.
Fees are usually well under a cent, which is the whole point of the project.
What they're building
As of mid-2026, Bitcoin Cash's direction is clear: evolve from 'just peer-to-peer cash' into a programmable smart-contract chain, while keeping fees tiny. BCH now ships a network upgrade on a predictable annual cadence — every May 15 — voted in through an open CHIP (Cash Improvement Proposal) process rather than by any single company. That yearly rhythm is itself part of the strategy: steady, boring, forkless upgrades.
The most recent upgrade, nicknamed 'Layla,' activated on May 15, 2026 and added four scripting CHIPs — Loops (bounded looping via OP_BEGIN/OP_UNTIL), Functions (reusable OP_DEFINE/OP_INVOKE code), Pay to Script, and Bitwise (restored bit operations). Together with the 2025 upgrade (which removed the old 201-operation cap and added arbitrary-precision BigInt math), these make BCH contracts dramatically more capable — enough that developers are now discussing on-chain use cases like zero-knowledge-proof verification and post-quantum cryptography.
The stated goal for the near term is to turn these new low-level capabilities into actual usage: more CashTokens apps, decentralized exchanges, stablecoin rails, crowdfunding escrow and merchant tools built natively on BCH. The honest watchpoint the ecosystem itself flags is whether developer activity and real on-chain utility actually grow to match the new tech — the capability is now there; adoption is the open question.
'Layla' upgrade (activated May 15, 2026): Loops, Functions, Pay to Script, and Bitwise CHIPs — a big leap in smart-contract expressiveness.
Builds on the May 2025 upgrade (VM Limits + BigInt) that lifted long-standing script limits and added very-high-precision integers (numbers up to roughly 80,000 bits).
Predictable annual upgrade cadence every May 15, governed by the open CHIP process and multiple independent node teams (BCHN, Bitcoin Verde, Knuth).
Growing the CashTokens ecosystem: on-chain tokens, NFTs, DEXes, stablecoin rails and covenant-based apps on the base layer.
New primitives aimed at advanced use cases like zero-knowledge proofs and post-quantum-ready contracts.
Ongoing focus: keep base-layer fees near-zero and scaling headroom high while adding programmability.
Quick facts
Launched
August 1, 2017 (hard fork from Bitcoin at block 478,558)
Founders
No single founder; championed by Roger Ver & Jihan Wu, early client (Bitcoin ABC) led by Amaury Séchet
Consensus
SHA-256 Proof-of-Work (same as Bitcoin)
Block size / time
Up to 32 MB blocks, ~10-minute block time
Max supply
21 million BCH (same cap as Bitcoin)
Circulating supply
~20 million BCH (as of mid-2026)
Issuance
Halving every 210,000 blocks; reward cut to 3.125 BCH at the April 2024 halving
Token use
Payments/digital cash, transaction fees, mining rewards, and gas/collateral for CashTokens smart contracts
Upgrade cadence
Annual network upgrade every May 15 via open CHIP governance
The ecosystem
CashTokens (2023) — native fungible tokens and NFTs on the BCH base layer, comparable in spirit to what tokens do on Ethereum but far cheaper to validate
CashScript — a high-level smart-contract language for writing conditional payments, escrow and covenants on BCH
CashFusion — a non-custodial privacy tool that cooperatively merges many users' transactions to frustrate blockchain tracing
Wallets: Electron Cash, Bitcoin.com Wallet, Paytaca, and hardware support via Trezor/Ledger
Payments & merchants: point-of-sale and low-fee remittance are the flagship real-world use case; some regions use BCH-based stablecoin rails
On-chain apps: decentralized exchanges, crowdfunding/escrow contracts, payment vouchers and token issuance built on CashTokens
2017Bitcoin Cash forks from Bitcoin on August 1 at block 478,558 over the block-size scaling debate; BTC holders receive 1 BCH each. Block limit raised to 8 MB.
2018Block limit raised to 32 MB. In November, a governance and technical dispute splits BCH again — Bitcoin SV (BSV), backed by Craig Wright and Calvin Ayre, breaks off.
2020First BCH halving (block reward 12.5 → 6.25 BCH). A dispute over a proposed miner-funded developer tax (the 'Infrastructure Funding Plan') splits the chain again; Bitcoin Cash Node (BCHN) becomes the dominant implementation.
2023CashTokens activate in the May upgrade, giving BCH native fungible tokens, NFTs and on-chain smart-contract capability.
2024Second BCH halving in early April cuts the block reward from 6.25 to 3.125 BCH (at block 1,050,000).
2025May 15 upgrade activates the VM Limits and BigInt CHIPs — removing the old 201-operation script cap and adding arbitrary-precision integer math.
2026'Layla' upgrade activates May 15 with the Loops, Functions, Pay to Script and Bitwise CHIPs, sharply expanding BCH smart-contract power.
The honest risks
Weaker network security than Bitcoin. BCH shares Bitcoin's SHA-256 algorithm but has a far smaller hashrate, making a 51% (double-spend) attack much cheaper and more realistic. Public estimates have pegged the cost of renting enough hashpower to attack BCH at only a few thousand dollars per hour, and the chain has seen contentious mining incidents in the past.
Adoption never matched the vision. Despite years of 'be the real cash' messaging, BCH has not achieved merchant or consumer adoption anywhere near Bitcoin's. Its network effect, liquidity and brand recognition are a small fraction of BTC's.
Repeated contentious forks. BCH itself was a fork, then split into Bitcoin SV (2018) and again over the developer-funding fight (2020). This history of community schisms signals governance fragility and has diluted the brand across competing chains.
Intense competition. It's squeezed from every side — Bitcoin as the store-of-value king, stablecoins and Lightning for cheap payments, and faster/cheaper chains (Solana, etc.) plus Ethereum L2s for smart contracts. BCH is rarely the clear best choice for any single job.
Price has been weak. BCH trades far below its 2017 all-time high and has underperformed BTC over long stretches — it fell sharply over the year into mid-2026 — so holders have carried real drawdowns and opportunity cost.
Bigger blocks push toward centralization pressure. Larger blocks need more bandwidth and storage to validate, which can raise the cost of running a full node over time — the exact concern small-block Bitcoiners raised at the 2017 split.
Smart-contract adoption is unproven. The 2023–2026 upgrades gave BCH real programmability, but whether developers and users actually show up to use it is still an open question, not a settled result.
Regulatory overhang. Like all crypto assets, BCH faces uncertain and shifting rules across jurisdictions that could affect exchange listings, custody and use as payment.
How to invest (safely)
Education first, not financial advice. Nothing here is a recommendation to buy — it's how to do it safely if you choose to. Only ever risk money you can afford to lose entirely; BCH is a volatile asset that has had deep, multi-year drawdowns.
Use a reputable exchange. BCH is widely listed on major regulated exchanges (Coinbase, Kraken, Binance, etc.). Prefer one that operates legally in your country, complete its identity verification, and turn on two-factor authentication with an authenticator app, not SMS.
Understand the ticker traps. Buy BCH (Bitcoin Cash) — do not confuse it with BTC (Bitcoin), BSV (Bitcoin SV), or lookalike-named tokens. Always double-check the symbol and the network before sending.
Move meaningful holdings to self-custody. 'Not your keys, not your coins.' For anything beyond pocket change, withdraw to a wallet you control — Electron Cash or Paytaca for software, or a hardware wallet like Trezor/Ledger for larger amounts.
Guard your seed phrase like cash. Write the recovery phrase on paper (or metal), store it offline in more than one place, and never type it into a website or share it. Anyone with the seed owns the coins; there is no support line to reverse a theft.
Test with a tiny amount first. Send a small BCH transaction to confirm your address, wallet and process work before moving a larger sum — mistakes on-chain are irreversible.
Consider dollar-cost averaging and think long-term. Buying a fixed small amount on a schedule reduces the risk of buying a single bad top, and avoids trying to time a notoriously unpredictable market.
Keep records for taxes. In many jurisdictions buying, selling or spending BCH is a taxable event — log your transactions as you go rather than reconstructing them later.
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