Recently, I've seen people watching large on-chain transfers and hot/cold wallets on exchanges, shouting "smart money" at every move.

Honestly, many of these are just internal rebalancing or risk control actions; they have little to do with how you and I manage our assets going forward.

My rough categorization: for small daily expenses, don’t make the security lock a maze—hardware wallets are enough. The key is that the permissions/signature prompts before transfers should be understandable; otherwise, even with security, you might make a mistake.
Once assets grow, single points of failure become glaring. Multi-signature is more like "拆开存钥匙" (拆开存钥匙: splitting keys for storage), but the collaboration cost can be quite annoying—suitable for those who can accept the process.
For higher levels or concerns about loss or accidents, social recovery is "making recovery a network of relationships."
The benefit is that it won't be stuck by a single piece of paper; the downside is that the choice of people and rules is very restrained. Otherwise, if the permission boundaries become blurred, it could turn into a minefield.

Anyway, don’t get anxious just because "big players are moving."
Choose based on your own scale and the probability of mistakes.
What about you?