I used to rely entirely on the exchange’s monthly PDF exports for bookkeeping—at year-end when reconciling, I’d almost wish I could time-travel back and slap myself. Now I’ve learned my lesson: for every deposit/withdrawal and on-chain interaction, I tag it on the spot, and use a simple table with notes—since when I backtest, I’m already used to keeping the data. Recently I saw people discussing ETF fund flows together with U.S. stock risk appetite, and honestly it’s kind of interesting. But if you follow the trend with your books, things get messy—so I’d rather get my own tax basis sorted out cleanly first. No need to make it too fancy; as long as I can pull the data anytime, that’s enough.