What is Decentralized Exchanges (DEX)

A Decentralised Exchange (DEX) is a cryptocurrency trading platform that operates through smart contracts on a blockchain — enabling peer-to-peer trading directly from users' wallets without any company, custodian, or central matching server controlling transactions or holding funds. HOW DEXs WORK: TWO MODELS Automated Market Maker (AMM) DEXs: The dominant model. Instead of matching buyers and sellers through an order book, AMMs use liquidity pools — smart contracts containing pairs of tokens deposited by liquidity providers. Trades execute against the pool algorithmically, with prices determined by mathematical formulas (typically the constant product formula x × y = k). Examples: Uniswap (Ethereum), PancakeSwap (BNB Chain), Curve (stablecoins), Raydium (Solana), Trader Joe (Avalanche). Order Book DEXs: More similar to centralised exchanges, with on-chain or hybrid order books. Less common due to gas costs of placing and cancelling orders. Examples: dYdX (operates on its own app-chain), Serum/OpenBook (Solana). HOW TO USE A DEX Connect a compatible Web3 wallet (MetaMask for EVM chains, Phantom for Solana). Ensure you have the native chain token for gas fees (ETH for Ethereum DEXs, SOL for Solana DEXs). Select tokens to swap, review price impact and slippage tolerance, and confirm the transaction in your wallet. DEX VS. CEX COMPARISON Custody: DEX — you control your keys. CEX — exchange controls your keys. KYC: DEX — none required (permissionless). CEX — mandatory identity verification. Listing: DEX — any token can be listed instantly. CEX — requires formal listing process. Fees: DEX — trading fees plus network gas. CEX — trading fees only (no gas). Liquidity: CEX — typically higher for major pairs. DEX — growing, especially on Ethereum and Solana. TOP DEX PLATFORMS BY VOLUME Uniswap (Ethereum + multiple chains), Jupiter (Solana — DEX aggregator), PancakeSwap (BNB Chain), Curve (stablecoin specialist), Aerodrome (Base chain), Velodrome (Optimism).

Terms in addition to the Decentralized Exchanges (DEX)

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline.  The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.