Honestly, every year during tax season, I'm most afraid not of the price fluctuations, but of "which chain and which address I was doing what on at that time"… So now I force myself to develop the habit of keeping records: regularly exporting transaction/deposit and withdrawal records from exchanges to the cloud; labeling my frequently used addresses on the blockchain (which ones are mine, which ones are friends/project teams/new wallets), and taking screenshots of a couple of key transfers, to avoid staring at a string of hashes and feeling lost at the end of the year. DeFi and cross-chain activities are even more troublesome; don’t wait until the memory fades to fill in the gaps, it really drives you crazy. Recently, social mining and fan tokens have become popular again, and attention can also be considered "mining"—I'm not sure either—but those small transactions you've clicked, claimed, or transferred might eventually turn into a bunch of fragmented records that need explaining… Anyway, I’d rather record a couple of extra transactions at the time than play detective at the end of the year.