How Do Cryptocurrencies Work?
Cryptocurrency is a digital asset based on cryptographic principles, and its core operational mechanism relies on blockchain technology.
Core Technologies: Blockchain and Cryptography
- Blockchain: Cryptocurrencies operate on a decentralized, distributed public ledger called a blockchain. All transaction records are organized into "blocks," arranged chronologically, and linked using cryptographic techniques to form an immutable chain. Each block contains a set of transaction records, which, once verified and added to the chain, are permanently recorded.
- Decentralization: Unlike traditional financial systems, cryptocurrencies have no central issuing or regulating authority (such as banks or governments). They are managed and verified by a distributed network of computers (nodes). This peer-to-peer (P2P) system ensures transparency and user asset autonomy, improving efficiency and reducing transaction costs.
- Cryptography: Cryptocurrencies use cryptographic techniques to secure transactions, maintain data integrity, and control the generation of new units. Users authorize transactions by generating digital signatures with their private keys, and network nodes verify these signatures before adding transactions to new blocks. Public keys are used to generate public wallet addresses.
Transactions and Security
- When a cryptocurrency transaction is initiated, the transaction information is broadcast across the entire network, where it is jointly verified and confirmed by the network's nodes. Once verified, the transaction is recorded on the blockchain.
- Cryptocurrency units are typically created through mechanisms such as "mining" (using computer processing power to solve complex mathematical problems to generate new coins) or "staking" (locking cryptocurrencies in the network to support its operation and earn rewards).
- Cryptocurrencies are not stored in wallets; rather, their ownership is recorded on the blockchain. Digital wallets (such as hot wallets or cold wallets) store the private keys that provide access to these funds.
- Private Key: Similar to a bank card PIN, it must be kept strictly confidential and is used to authorize transactions. If lost, control over the associated cryptocurrency will be permanently lost.
- Public Key: Similar to a bank account number, it can be shared publicly and is used to receive cryptocurrencies.
Key Features and Market Dynamics
- Digital or Virtual Form: Cryptocurrencies exist purely in digital form and have no physical manifestation.
- Global 24/7 Operation: Without reliance on intermediaries like banks, users can conduct direct peer-to-peer transactions.
- Limited Supply: Many cryptocurrencies (such as Bitcoin, with a maximum supply of 21 million coins) have a limited supply, which helps curb inflation and enhances their potential as a store of value.
- Market Progress: In 2025, the rapid expansion of spot Bitcoin ETFs in the US provided a compliant and scalable entry path for institutional capital. As of March 2026, the 20 millionth Bitcoin was mined, further solidifying its status as "digital gold." According to data from August 17, 2026, the global cryptocurrency market size is projected to grow from $7.33 billion in 2025 to $8.47 billion in 2026, reaching $27.02 billion by 2034, at a compound annual growth rate of 15.60%. As of September 2026, the total cryptocurrency market capitalization increased by 17.6% to $2.70 trillion, with Bitcoin rising 24.8% in seven days.
How to Buy Cryptocurrencies?
There are various ways to buy cryptocurrencies, with the most common and convenient method being through cryptocurrency exchanges.
Main Purchase Platforms
- Cryptocurrency Exchanges: The most common way to buy, offering various cryptocurrency trading, wallet storage, and other services, usually with intuitive operations. Major global CEXs include Binance, Coinbase, Kraken, OKX, Bybit, MEXC, etc.
- Traditional Securities Brokerage Platforms: Some online brokers also offer cryptocurrency buying and selling, usually with lower transaction costs, but potentially fewer cryptocurrency features.
- Bitcoin ATMs: Allow purchasing Bitcoin with cash, but typically incur higher fees.
- Bitcoin ETFs: Purchased through brokers, suitable for traditional investors who do not need to directly hold cryptocurrencies but can participate in their price fluctuations.
Purchase Steps (Using an Exchange as an Example)
Here is a general process for buying cryptocurrencies:
- Choose a Platform: Select a reputable cryptocurrency exchange that supports your region and meets your needs and local regulatory requirements.
- Register an Account: Sign up for a new account using your email or phone number.
- Identity Verification (KYC): Upload a photo ID and proof of address as required by the platform to complete identity verification. This is a necessary step to ensure account security and comply with Anti-Money Laundering (AML) regulations.
- Add Payment Method: Exchanges typically support various deposit methods, including bank transfers, credit/debit card payments, etc. Please note that credit/debit card payments may incur higher fees. Some platforms also support P2P (peer-to-peer) trading, allowing users to buy from other users using local payment methods.
- Select Cryptocurrency and Amount: Within the platform, choose the cryptocurrency you wish to buy (e.g., Bitcoin BTC, Ethereum ETH) and enter the purchase amount. The minimum purchase amount can often be as low as $10.
- Confirm and Complete Purchase: Carefully review the order details, then confirm and complete the payment.
- Secure Storage: After purchasing, you can store the cryptocurrency in the wallet provided by the exchange. However, for higher security, many users choose to transfer it to a personal cryptocurrency wallet (such as a hardware cold wallet or a software hot wallet) to have full control over their private keys.
Please note that the cryptocurrency market is highly volatile, and the global regulatory environment is constantly evolving. Before investing, be sure to fully understand the risks and make informed decisions.
