Last night, the blockchain was clogged again, turning into a mess. I made a transaction, and it kept pending, which made me realize that many people think "click confirm and it's done"... Actually, it's just queuing in the mempool, with miners/packagers choosing those who pay more first. If you pay a normal fee, you can only wait; during this time, the price slippage and pool status might change. The worst case is waiting half a day and still failing, wasting some gas as tuition.

Now I mostly automate it: first simulate whether it can go through, then adjust the fee based on congestion. If it can't get through, I cancel/retry directly—no need to stubbornly wait. By the way, recently there's been a heated debate over NFT royalties, with the secondary market trying all sorts of workarounds for "more liquidity"... Honestly, it's just about who is willing to pay that little extra. The mempool also reflects this human nature. Anyway, don't fight the chain directly; play by the rules.