Lately I keep hearing people talk about block builders and bundles, as if not understanding them will get you "eaten"... I think retail investors just need to know "don’t blindly run around and trade," enough: use a reliable wallet/front end, don’t randomly click pop-up signatures, enable MEV protection if possible, and don’t switch to obscure RPCs just to save a tiny bit of gas.

Think of bundles as a "shortcut" method of packaging; you can reduce being front-run but don’t idolize it. Anyway, I handle small amounts with multiple touches, and if I want to try a new protocol, I just test it once with a wallet—if I lose, I accept it.
Now there are a bunch of testnet incentives and point expectations going on, and no one knows if the mainnet will really issue tokens. I even saw someone sending transactions like writing homework just for points… thinking about it later, it’s pretty funny.
In short, don’t see yourself as an institution, focus on basic security, don’t get carried away—that’s all.