Recently, when looking at on-chain transfers, someone always says, "This is too coincidental, there must be insider information."

Now I prefer to break down the coincidence first: where the money comes from (exchange withdrawal, cross-chain, or old address reflows), who it passes through (routing, aggregators, mixers that look very "coincidental"), and where it ends up (adding liquidity to pools, buying NFTs, or returning to a familiar hot wallet).
Many times, it's not that the script is well-written, but that the paths are limited, and looping around naturally leads to collisions.

By the way, the recent NFT royalty war also seems quite similar: everyone is arguing over the result of "creators being drained," but when secondary liquidity tightens, the paths become more concentrated, making it look more like "the same group of people" on the chain.
To put it simply, it's easier to explain first before talking about conspiracy; I also worry about missing something, so I'll leave it at that.