Today I saw that kind of "coincidental transfer" again, a bunch of addresses passing by each other a few times and being called the same group... I later forcibly traced the path, and it actually looks quite similar: the main wallet stays still, first using several intermediaries to split UTXOs/balances, then withdrawing a sum from an exchange as a "clean entry," and finally returning to the same aggregation point, with the timing deliberately spaced out. To put it simply, it's not a coincidence, but making the traces look more like coincidences. Airdrop season makes this even more common, with task platforms countering anti-witchcraft by making people look like they're clocking in at work, so everyone prefers this kind of routing. Anyway, now when I see abnormal paths, I first screenshot and save them, then force myself to review for two minutes before getting emotional... otherwise, I end up rushing in at the last second.