Just now, I was watching a transfer that looked like a "coincidence": A sends to B, and B immediately sends to C, with similar amounts, which at first glance seemed like a chain.

Later, after breaking down the path, I found that B isn't even a person; it's a routing/aggregation layer, and the two hops are actually the same transaction executed in different contracts, with the small difference mostly being fees/slippage margins...
Many "coincidences" on-chain are, frankly, because you haven't mapped out the intermediate toolchain.

I also thought about the recent NFT royalty disputes, which are similar: just looking at the secondary market transaction alone, everyone tells their own story;
Only when you open up the path (listing, matching, aggregation, transfer, splitting) do you see where the money actually comes from and who is taking a cut.
Anyway, when I see strange transfers now, I don't jump to conclusions; I first review the call relationships and fund flows, and stay calm.