Recently, I've seen people watching "whale addresses" and preparing to copy trades. Honestly, what I fear most is that you think they are building a position, but in reality, they are hedging/covering, treating you as liquidity to be taken. On-chain actions look very similar: entering positions while opening opposite positions, or transferring a wallet around before going to an exchange. You can't really judge the intent just by a large transfer.

My own habit is to first clarify permissions: for new contract interactions, don't give unlimited approval; set limits where possible. Then check whether this address has been following the same strategy all along or suddenly changing tactics or protocols. There are many tutorials, but I prefer to look at those explaining "how to filter out false signals/how to identify hedging," rather than flashy signals or shouting charts.

By the way, recently, the debate over privacy coins, mixing services, and the boundaries of compliance has become quite heated... I don't take sides. Anyway, the more complex your on-chain path, the higher the risk and the chance of misjudgment. It's more solid to first reduce your own exposure.