I'll try to explain something that many people ask: after all, what does DEX mean and why is everyone talking about it?

Basically, a decentralized exchange is a place where you trade cryptocurrencies directly with other people, without needing an intermediary. But to better understand what DEX means, it's good to know how we used to trade before.

When you use a traditional exchange like Coinbase or Binance, you're sending your assets there. You create an account, provide your information, deposit money, and only then can you buy Bitcoin or other tokens. The problem? You don't truly control those bitcoins. The exchange holds the private keys. If the exchange goes down, gets hacked, or simply blocks your account, you're in trouble.

Transactions on these centralized exchanges don't happen on the blockchain. Everything is stored in their database. It's fast, easy for beginners, but you're basically trusting your money to third parties.

And that's where the concept comes in: what does DEX mean? It's exactly the opposite. You trade directly, your coins stay in your wallet with your private keys. No one controls anything but you.

There are three ways a DEX can operate. Some have on-chain order books, where every move is recorded on the blockchain. It's highly decentralized but can be expensive and slow. Then there are off-chain order books, which are faster but lose some security. And there are AMMs, automated market makers, which dispense with order books and use algorithms to set prices. Uniswap uses this model.

With AMMs, you don't need to find someone who has exactly the token you want. You put in your Chainlink (LINK) and can swap it for Compound (COMP) even if no one on the other side wants to make that specific trade. It works because there are liquidity pools where users earn rewards for keeping their funds in smart contracts.

What are the advantages? First, no one asks for your CPF, ID, or bank details. You don't need to do KYC because the DEX isn't under the same regulations. Second, since you control your keys, you're immune to platform hacks. Third, you can create new tokens and start trading instantly. It's perfect for decentralized finance, the movement where you lend, borrow, and trade without any banks.

But it's not all smooth sailing. What DEX means also comes with disadvantages. You only trade cryptocurrencies, not fiat currencies like reais or dollars. If you want to enter a DEX, you already need to have crypto. Then there's the complexity: if you want to use Uniswap running on Ethereum, all tokens must be there. Bitcoin isn't. You need to convert your ETH into Wrapped Ether to trade.

And there's the responsibility factor. On a centralized exchange, there's someone to complain to if something goes wrong. On a true DEX, there isn't. You're responsible for everything. The community helps, but ultimately it's you against the world.

In the end, what DEX means is exactly that: you give up convenience and support to gain full control and privacy. Some people find this liberating. Others find it scary. But it's the trade-off you make for true decentralization.