The past couple of days, the blockchain has been a bit congested. I see many people still think that once they click confirm, the transaction is "already completed." Actually, your transaction first queues in the mempool, like a delivery person waiting for the elevator downstairs, with miners/validators choosing to include it based on who tips more. If you tip less, you keep waiting; if you're unlucky, it might timeout and get returned, not losing your money, but making you anxious first. Then you send another transaction with a higher fee, treating yourself like a leek being cut twice.

What's even more funny is that the more congested it gets, the more people click on links to "speed up" transactions. Recently, hardware wallets have been out of stock, and there's a bunch of phishing scams—it's really when you're emotional that you're most willing to pay the tuition. My approach is pretty simple: when there's congestion, do less; if you really need to act, first make sure you understand what you're signing. Taking it slow is better than signing the wrong thing.