Recently, I've seen everyone speculating about whether the ecosystem will move after a major mainstream blockchain upgrade/maintenance.

I think there's no need to rush into migration; just don't lose your wallet first...
Phishing sites love to take advantage of these times to set up "cross-chain airdrops / one-click migrations," and their pages look even more like the project team’s.

As for mnemonic phrases, honestly, they are like house keys.
Any site that says "you need to input your mnemonic to migrate/unlock"—just close the page.
Don't trust signatures too much either; many are just asking you to grant unlimited permissions, then slowly drain your funds after a couple of days.
My habit: for new projects, only use a clean small-wallet account, authorize only as needed, and revoke immediately after use.

Not long ago, I was quite interested in a "security science popularization" account, but then I found it was constantly sharing various "urgent links," and there were a bunch of victims in the comment section...
I immediately unfollowed—way too scary. I’d rather have information come a bit slower.
That’s all for now; don’t let yourself become someone else’s case study.