I just made a stupid mistake again... I wanted to quickly complete a swap, so I set the slippage to the maximum, but the depth wasn't enough, and the trade was split into several parts, costing more and more, and in the end, I didn't get the expected amount. Basically, it was greed for convenience + not checking the order book, the timing was off, I could have split the order into two or three parts, or just placed a limit order and waited.

Now, after reviewing, I remember two points: first, check if the pool is deep enough—don't treat a small pool like a highway; second, don't confirm when you're emotional. I’d rather miss out than get "slipped" for a quick profit.

By the way, I thought of the recent NFT royalty disputes—creators want income, traders want liquidity... but in the end, the users pay the price, and the friction costs are hidden in the details. As for self-custody and signing, I still stick to my usual approach: take it slow, look at the address and parameters more carefully, and avoid digging your own hole.