Just now, I saw someone say "Why do I keep getting front-run when I send a transaction?" My first reaction: Oh, here we go again... Retail investors don't need to study blockchain builders or bundle research like academic papers; just knowing enough is enough: the transactions you send may not go directly onto the chain, someone might bundle a bunch of transactions and then submit them to the block proposer, and the order can be manipulated, so the slippage, front-running, and strange transaction prices you see might not be your mistake.

To put it simply, ordinary people only need to remember three things: 1) Don't set too tight slippage, don't go all-in in the hottest second; 2) Use private/protected routes if possible, at least to avoid being a "public menu"; 3) Meme and celebrity shoutouts tend to attract attention, and the last one often serves as fuel for others on-chain... Veteran traders advise against it not out of arrogance, but because they genuinely care about transaction fees. Anyway, I now prefer to earn a little less than to be treated as "side dish" in someone else's bundle.