I woke up thinking about something that many people don't realize while they sleep: MEV bots are literally extracting value from your transactions on the blockchain. Seriously, this is very real and happens all the time on the Ethereum network.

Basically, these MEV bots can profit by manipulating the order of transactions. They see a large trade coming in and can position themselves before or after it to capture the spread. There are several types circulating out there: arbitrage bots that exploit price differences between DEXs, those that do sandwich trading (buying and selling before and after big operations), front-runners that jump ahead of important transactions, and even bots that use flash loans to manipulate everything. I've seen analyses mentioning more than 30 different variations of these MEV bots, each with its own strategy.

The problem is that on Ethereum, this has become almost a parasite of the DeFi ecosystem. But the good news? You can defend yourself. The most obvious strategy is to reduce slippage, but beware: too low and your transaction will fail. Another approach is to trade in pools with high liquidity because the larger the pool, the less impact an individual transaction has on the price, making it harder for the MEV bot.

There are tools that help a lot. Flashbots Protect is an option—you go to their website, click on start setup, select protect yourself, and add it to your wallet. If that doesn’t work, there’s MEV Blocker, which does basically the same thing: you add the MEV blocker RPC manually or via your wallet.

On the Solana network, things are a bit different. The recommended slippage is between 1.5% and 2% at most. Above that, you’re exposed too much. There are specific tools like Trojan or Maestro that have native anti-MEV features.

The point is: these MEV bots aren’t going to disappear. But understanding how they work and taking the right precautions greatly reduces the risk of silently losing money. It’s worth spending a few minutes to set up these protections.