For two years, "crypto" was one trade.

If you held Ethereum, you were mostly making a higher-octane bet on Bitcoin. The two rose and fell together, so owning one and owning the other came to nearly the same thing. When they split for a week, everyone here learned to call it noise and wait for it to snap back.

This past week or two, the split did not snap back. It lined up too cleanly with something happening underneath the price.

You have the headline already. The exchange-traded funds, the clearest read on what big money is doing, bought one major and sold the other. Ethereum's funds took in money five days running and turned the week green. Bitcoin's faked a recovery in early July and bled back out, closing what Bitwise called the worst quarter for Bitcoin fund outflows on record. Those are the numbers. The reason the two are pulling apart is the useful part.

The instinct is to treat this as a blip. Same asset class, same macro, same strong dollar pressing on both. A week of divergence looks like a rounding error against two years of moving in lockstep.

But the divergence has a cause. It maps onto the two coins now being driven by different buyers and different sellers, each with its own reason to move. Seen that way, this week gave us the first clean look at the two sides pulling in opposite directions.

So the habit of a lifetime gets tested here. For two years the safe assumption was that these two moved as one, and you could hold "crypto" as a single lump and be roughly right. That assumption is what just cracked.

And this is not an academic point. A lot of people are still holding the two majors as if they were one coin, on an assumption nobody has stopped to re-check.

If the two majors have genuinely split like this, the question you have been asking changes. It stops being is the bottom in for crypto, and becomes which engine are you actually buying.