Recently, I keep seeing people ask how deep retail investors need to understand about block builders, bundles, and these things. To put it simply, you don't need to memorize the principles; just remember one thing: when you click "Swap," you're not directly on the chain. Someone is packaging and sorting in the middle. Whoever offers better tips or private "gift packs" more secretly is more likely to cut in line.

Just watch out for two things: don't sign blindly during transaction simulation, avoid routing through strange contracts, don't set slippage too high, and use private or anti-front-running channels when available. Don't try to hard against MEV.

Why do I get curious enough to study this stuff? Because I fear that helpless feeling of "I didn't click wrong, why did my money disappear?"… After checking on-chain, I found out it was being front-run, sniped, or I signed a phishing authorization. Tool users need to mark the traps in advance.

By the way, I think the recent collapse of some blockchain games is similar—inflation + studio manipulation + coin price spiral. In the end, retail investors only realize they didn't understand who was writing the rules when they take the hit.
Anyway, my current bottom line is: understand the flow of funds, understand the permissions, and understand whether your transaction might be front-run. For other details… that’s enough.