Just saw that kind of "quick swap gets sniped" transaction on the chain, and it really kind of broke my confidence… You think you've caught an arbitrage window, but outside that window, there's a row of people waiting for you to ignite. To put it simply, this sandwich attack is just using your slippage as someone else's fee. Now, when I see large swaps, I actually get a bit cautious, preferring to split orders, limit slippage, or even just not chase at all.

Recently, testing on the testnet feels pretty similar: everyone is betting on whether the mainnet will issue tokens, but the most stable returns often come from contributing interaction volume + gas to others. The opportunity isn't gone, but I have to ask myself first: am I arbitraging, or am I just using liquidity and fees as raw materials… It's a bit tricky. Anyway, I'll first fill in the chart of positions, time, and emotions, so I don't end up blaming the market later.