#PAXG# #BCH# #BTC# 比特現金（BCH）核心介紹

比特現金（Bitcoin Cash，簡稱BCH）是比特幣（BTC）的硬分叉幣種，於2017年8月誕生，核心目標是解決比特幣網路交易擁堵、手續費高的問題，定位“更適合日常支付的加密貨幣”。

1. 核心誕生背景

比特幣網路因最初設計的“1MB區塊大小限制”，導致每秒處理交易（TPS）僅約3-7筆，高峯期常出現交易擁堵、手續費飆升（曾達數十美元/筆）。2017年，比特幣社區因“是否擴大區塊”分歧，支持擴大區塊的陣營通過硬分叉（修改區塊鏈代碼並生成新鏈），誕生比特現金。

2. 關鍵技術特點

- 更大區塊容量：初始將區塊大小提升至8MB，後進一步支持動態調整（最大可到32MB），使TPS提升至約100-200筆/秒，大幅降低交易擁堵概率。
- 更低交易成本：因區塊空間更充足，交易手續費遠低於比特幣，通常僅需幾分到幾美元（視網路擁堵情況），適合小額高頻支付。
- 兼容比特幣基礎設計：沿用比特幣的SHA-256加密算法、去中心化帳本結構，早期持有比特幣的用戶，在分叉時可按1:1比例獲得對應數量的BCH。

3. 主要應用場景

- 日常支付：主打“點對點電子現金”功能，部分商家（如線下零售店、線上平台）支持BCH付款，可直接用於購買商品或服務。
- 價值存儲與轉帳：作爲加密資產，可用於跨地域轉帳（尤其跨境場景，無需通過銀行，到帳速度快於傳統匯款），也被部分投資者視爲“比特幣的替代存儲選擇”。

4. 市場與生態現狀

- 市值排名：長期位列加密貨幣市值前10-20名（截至2024年5月），流動性低於比特幣、以太坊，但具備穩定的交易市場。
- 社區與發展：核心開發團隊持續維護網路，支持“零知識證明”等技術升級，以提升隱私性與擴展性，但社區規模與影響力遠小於比特幣。

5. 與比特幣（BTC）的核心區別

對比維度 比特現金（BCH） 比特幣（BTC）
區塊大小 動態調整（最大32MB） 1MB（通過“隔離見證”間接擴展）
交易速度（TPS） 約100-200筆/秒 約3-7筆/秒
核心定位 日常支付工具（電子現金） 價值存儲（“數字黃金”）
交易手續費 低（幾分-幾美元） 高（高峯期數十-數百美元）Core Introduction to Bitcoin Cash (BCH)

Bitcoin Cash (BCH for short) is a hard fork of Bitcoin (BTC). Launched in August 2017, its core goal is to address issues of transaction congestion and high fees on the Bitcoin network, positioning itself as a "cryptocurrency more suitable for daily payments".

1. Core Background of Its Inception

Due to the "1MB block size limit" in Bitcoin's original design, the Bitcoin network can only process approximately 3-7 transactions per second (TPS). During peak periods, it often experiences transaction congestion and a sharp surge in fees (which once reached dozens of US dollars per transaction). In 2017, the Bitcoin community was divided over the "whether to expand the block size" debate. The camp that supported block expansion created a new blockchain by hard forking (modifying the blockchain code), giving birth to Bitcoin Cash.

2. Key Technical Features

- Larger Block Capacity: Initially increased the block size to 8MB, and later further supported dynamic adjustment (with a maximum of 32MB). This raises the TPS to approximately 100-200 transactions per second, significantly reducing the probability of transaction congestion.
- Lower Transaction Costs: Thanks to the more sufficient block space, transaction fees are much lower than those of Bitcoin, usually ranging from a few cents to a few US dollars (depending on network congestion), making it suitable for small-value and high-frequency payments.
- Compatibility with Bitcoin's Basic Design: It inherits Bitcoin's SHA-256 encryption algorithm and decentralized ledger structure. Users who held Bitcoin in the early days could receive Bitcoin Cash in a 1:1 ratio at the time of the fork.

3. Main Application Scenarios

- Daily Payments: Focusing on the function of "peer-to-peer electronic cash", some merchants (such as offline retail stores and online platforms) accept BCH payments, which can be directly used to purchase goods or services.
- Value Storage and Transfer: As a cryptocurrency asset, it can be used for cross-regional transfers (especially in cross-border scenarios, without going through banks, and with faster settlement speed than traditional remittances). It is also regarded by some investors as an "alternative storage option to Bitcoin".

4. Current Market and Ecosystem Status

- Market Capitalization Ranking: It has long been ranked among the top 10-20 cryptocurrencies by market capitalization (as of May 2024). Although its liquidity is lower than that of Bitcoin and Ethereum, it has a stable trading market.
- Community and Development: The core development team continues to maintain the network and supports technical upgrades such as "Zero-Knowledge Proofs" to enhance privacy and scalability. However, the scale and influence of its community are far smaller than those of Bitcoin.

5. Core Differences from Bitcoin (BTC)

Comparison Dimension Bitcoin Cash (BCH) Bitcoin (BTC)
Block Size Dynamically adjustable (max. 32MB) 1MB (indirectly expanded via "SegWit")
Transaction Speed (TPS) Approximately 100-200 transactions/sec Approximately 3-7 transactions/sec
Core Positioning Daily payment tool ("electronic cash") Value storage ("digital gold")
Transaction Fees Low (a few cents - a few US dollars) High (dozens to hundreds of US dollars during peak periods)