Recently, new L1/L2 projects have started offering incentives to attract TVL, and veteran users in the group are complaining "mining, selling, and withdrawing." I immediately think about the end-of-year tax reporting and having to go through records for half a day... Don't wait until December to realize this. My habit is: for every on-chain transfer, I first record the txhash, time, and notes in a spreadsheet (notes like "recharge/withdraw to self-custody/exchange/airdrop"). Exchanges regularly export transaction and deposit/withdrawal data, and I save a copy of the files monthly. Cross-chain and batch packaging are the easiest to mess up, especially when nonce is involved in multiple transactions, and later you can't tell which transaction is for what. Forget it, to put it simply: as long as you can explain "where this money came from and where it went" after a year, you've already won more than half the battle.