Recently, I was awakened twice by the thought of "how to file taxes at the end of the year"… To be honest, I'm not afraid of losing money, but of not matching the accounts. Now after each trade, I conveniently save: exchange transaction records, on-chain tx hash, screenshots at the time (including currency/amount/time) into a folder, named by date + notes, user-friendly for lazy people. Cross-chain transactions are even more deadly, especially Layer2s, which are busy arguing about TPS, fees, and subsidies, while I run back and forth on the bridge, ending up with a bunch of small residual coins in my wallet like scattered punctuation, and I’ll really cry when I look for the source later. Anyway, I first write a simple note explaining "why I did each action": arbitrage/airdrops/exchanging gas, leaving a clue for my future self. Auditing is romantic, tax reporting is practical, bugs are tragedies… just like that for now.