I’ve recently been looking into block builders and bundles—plainly speaking, retail users don’t need to memorize PBS/MEV like exam questions. You just need to know this: the transaction you send out may not be included in a block in the exact order you clicked the button. Someone might bundle it, cut in ahead, or wedge it in—most commonly, the pitfalls are sudden slippage, strange execution prices, or even ending up paying an extra amount because you got sandwiched.

For me, that “passing line” is just three things: use protected routing/private submission as much as possible (don’t leave yourself sitting in the public pool like a target), don’t force trades when liquidity is thin, and if you see abnormal execution first suspect that you got sandwiched rather than assuming “the chain is broken.” Recently, the wave around AI agents and automated trading has been pretty hot—everyone can hype the narrative—but the truly security-minded will ask first: where is your key stored, who have you authorized, and if there are failed retries, will it repeat the authorization… In any case, I’d rather go slower and avoid pitfalls.