Last night at 2 a.m., I was scrolling through on-chain data until my eyes started to hurt, and suddenly I thought, "Terms like 'data availability / ordering / finality' sound intimidating," but actually, you just need to follow one thread: Is the transaction you see actually visible to everyone (otherwise it's like sending a message in a small group first), is it queued in the order you think (otherwise someone might cut in line), and will it ultimately fail and rollback (otherwise you might think the transaction is confirmed but it’s not counted).

My biggest fear in small arbitrage isn’t a model miscalculation, but these three things being overlooked, and then emotions take over and cause chaos.

By the way, hardware wallets have been out of stock lately… phishing links are everywhere. The more this happens, the more you shouldn’t rush to click on unfamiliar “airdrop/upgrade” links. Security really is something you learn the hard way after losing once.
Anyway, I’d rather be a bit slower now, confirm first before acting.