These days, when you look at the cryptocurrency market, you can see really interesting changes happening. As hacking incidents at centralized exchanges keep happening one after another, people have started to turn their attention to DEX exchanges. Even in just the first half of last year, damages from hacks exceeded $2 billion, and it was shocking to see that even large exchanges were not an exception.

The reason I pay attention to DEX exchanges is simple. With a centralized exchange, the moment you deposit your assets, you lose actual control over them. That means the exchange could go bankrupt, management could suffer from moral failure, or they could suddenly block withdrawals for political reasons. There’s a saying the crypto community has repeated for a long time: “If it’s not your private key, it’s not your coin.” This is the core of it.

DEX exchanges fundamentally solve these problems. Since it’s a structure where individuals trade directly with each other through smart contracts, the exchange can’t touch your assets. Because all transaction records are left transparently on the blockchain, things like price manipulation or opaque operations are impossible in principle. There’s also no KYC process, so you don’t have to worry about personal information leaks, and anyone can use it freely over the internet without permission from any specific country or institution.

The structure of a DEX exchange can be broadly divided into three types. The most common is the AMM model used by places like Uniswap and PancakeSwap. In this model, users deposit assets into a liquidity pool, and smart contracts automatically calculate prices and execute trades—its advantage is that it’s fast and simple. Next is the on-chain order book model, where all trade orders are stored directly on the blockchain, which is transparent but has drawbacks: it’s slower and gas fees are higher. Projects like dYdX v4 and Hyperliquid are trying to solve this by building it on Layer 2. Finally, there’s also the off-chain order book model: trade orders are processed on centralized servers, and only the final settlement is recorded on the blockchain, improving speed and cost.

As of November last year, looking at the DEX exchange market, PancakeSwap is far ahead. Thanks to BNB Chain’s low gas fees and fast trading speed, along with a mobile-friendly interface. Uniswap, which once led the market, got spread across multiple chains, splitting up trading volume, while emerging DEXs in the Solana ecosystem like Meteora and Raydium are growing rapidly. Because Solana’s fees are low, it’s especially popular among meme coin traders.

In fact, there’s a lot you need to know if you want to invest in DEX exchanges. The biggest advantage is transparency. Since all transactions happen on-chain, anyone can check their trading history in real time. Because you manage your own private keys directly, you have full control over your assets. You can avoid hacking and exchange bankruptcy risks, and you’re also free from external censorship or control. Even tokens not listed on centralized exchanges can be traded by anyone by creating liquidity pools, so the range of options is much broader.

But there are also clear disadvantages. Because liquidity is distributed, large trades may be executed at worse prices than expected. This is called slippage, and it can be bigger than you might think. Smart contract risks also can’t be ignored. If there are vulnerabilities in the code or if a project hasn’t gone through audits, it is exposed to hacking risks. Losing your private key means permanently losing your assets, which is a major responsibility. In South Korea, the most inconvenient part is that you can’t directly deposit or withdraw KRW on DEX exchanges—you have to go through domestic exchanges first.

If you’re a beginner, it’s best to start with PancakeSwap’s CAKE token. It has various use cases like staking, liquidity mining, and participating in launchpads, making it good for learning the DeFi ecosystem. The tokenomics, which applies deflationary pressure through regular token burns, is also fine. Uniswap’s UNI token is the most stable choice in terms of market capitalization and liquidity, while dYdX’s DYDX token takes a community-centered approach.

If you’re using a DEX for the first time, you must verify project information first. Check the token’s official contract address, and prioritize using verified platforms like Uniswap and PancakeSwap. If you see abnormal trading volume or a pattern indicating a lack of sell orders, the likelihood of it being a scam is high. You must never neglect the security of your private key and seed phrase. When using a self-custody wallet like MetaMask, never store the seed phrase online—write it down on paper and keep it somewhere safe.

When you first use a DEX exchange, it’s wise to test with small amounts, check whether the network address is correct, and then start in earnest. Slippage is usually set to around 0.5% to 1%, but for tokens with high volatility, it can be increased to 2% to 3%. If you set it too high, your trade may be executed at a worse price than expected; if you set it too low, the trade could fail. Gas fees vary by network, so if Ethereum is expensive, consider cheaper networks such as BSC, Arbitrum, or Polygon.

When using a cross-chain bridge, you must be extra careful. When moving assets between different blockchains, you must verify the network address. If you send to the wrong network, recovery is almost impossible. In South Korea, a common method is to buy coins with fast transfer speeds like Ripple or Tron with KRW on a domestic exchange, send them to MetaMask, and then swap for the desired tokens on a DEX.

In the end, the core of DEX exchanges is that they offer high freedom. With that, investors also bear greater responsibility. For a successful DEX investment, thorough project verification, strong security awareness, and proper risk management are essential. To get out of the risks of centralized exchanges and enjoy true financial sovereignty, there’s no way except to study DEX and experience it firsthand.