Recently, I keep seeing people focus on block builders and bundles, honestly retail investors really don't need to turn themselves into researchers. I think knowing two things is enough: first, your transaction might not be included in the block at the moment you submit it; someone might be packaging, ordering, or even reordering it; second, the protections you can do are actually quite simple—don't rush in when liquidity is thin, don't sign permissions randomly, try to use reliable wallets/routes, and if necessary, split orders, set limit prices, and don't chase that tiny slippage.

And those large on-chain transfers and hot/cold wallets of exchanges being seen as "smart money" whenever they move, I now mostly treat as emotional indicators... but that doesn't mean it's the answer. Tonight, I'll revoke the permissions on a few old contracts first, then go to sleep.