Privacy Coins Under Stress: Did Thin Liquidity Make Them Fall Harder?

Zcash got hammered in its worst stretch of the last 90 days. Monero didn't. That cuts the 'privacy coins crash harder' story clean in half. At its worst, ZEC gave back 32.4% from peak to trough. XMR's deepest slide was 11.9%. Bitcoin's was 7.6%.

So one privacy coin looks like the textbook case of a thin market taking a beating. The other looks like a sturdy mid-cap. If thin venue access were the main driver, you'd expect both to behave the same way. They didn't.

A caveat first. The question we set out to test was about spreads, volume and price. Our data pack for this window covers price only: returns, volatility, drawdowns, best and worst days, and correlations. We don't have spread or volume numbers, and we won't invent them. So what follows tests the idea with the evidence we do have, which is how the prices moved.

The scoreboard

All three went up over the window. Worth keeping in mind. The drawdowns below are pullbacks inside rallies, not crashes in a bear market.

Zcash: the case for the theory

Zcash nearly tripled. It went from $455.45 to $1,358.30, a 198.2% gain in 90 days, and its best single day was a 24.8% jump on Aug 21. That isn't a coin drifting higher. That's a coin being chased.

Then the slide. From Sep 26 to Oct 18, ZEC dropped 32.4%, with its worst single day, an 11.2% fall, landing on Oct 8. Its annualized volatility of 120.4% is roughly three times Bitcoin's.

On the surface, that fits the liquidity-gap theory neatly. Smaller market, fewer places to sell, bigger moves when everyone bolts for the exit together. But there's a simpler explanation sitting right in the table. A coin that just tripled carries a lot of paper profit. When a rally that steep stalls, profit-taking alone can knock off a third. You don't need thin order books to explain it.

And we can't separate those two stories without spread and volume data. Price alone doesn't show whether sellers hit a thin book or just a crowded one.

Monero: the case against

Monero is the coin you'd most expect to suffer from poor venue access. Its market cap is smaller than Zcash's: $11.4 billion against $23.1 billion. If thin access made privacy coins fall harder, Monero should've been the worse of the two.

It wasn't close. XMR's max drawdown was 11.9%, from Sep 21 to Oct 10. Its worst day was a 5.4% drop on Sep 22, right at the start of that slide. Volatility came in at 56.3%. Higher than Bitcoin's 40.4%, sure. Nowhere near Zcash's.

Look at the gap, though. Monero's worst drawdown was only a few points deeper than Bitcoin's, despite a market cap less than one percent of Bitcoin's. That's not what a coin with a liquidity problem looks like under stress.

It also rallied less: up 68.3%, versus Zcash's 198.2%. Less run-up, less to give back. Again that points at momentum, not market plumbing, as the bigger factor.

The correlation numbers kill the 'privacy sector' idea

This is the most useful figure in the pack. The correlation between ZEC and XMR was 0.12. Close to nothing.

If privacy coins traded as a group, selling off together on delisting fears or regulatory headlines and sharing the same thin venues, you'd see them move in step. They don't. Over these 90 days, knowing what Monero did on a given day told you almost nothing about Zcash.

Zcash actually tracked Bitcoin more closely, at 0.54. Monero sat at 0.29 against Bitcoin. So ZEC acted like a high-octane version of the broader market, while XMR did more of its own thing.

The timing backs it up. Monero's slide began Sep 21. Zcash's began Sep 26. Bitcoin's didn't start until Oct 4. Three sell-offs, three different start dates. No single privacy-coin panic.

So, do privacy coins fall harder?

One of them did. One didn't. And the one that did had just put in the kind of run that tends to end in a sharp correction no matter how liquid the market is.

Our honest read: the data doesn't support a blanket 'privacy coins fall harder' rule. Zcash's drawdown is better explained by its momentum and its high sensitivity to Bitcoin. Monero's mild pullback cuts against the thin-liquidity theory outright, at least for this window. A liquidity gap may still exist. This price data just can't see it.

What this means for you

If you hold

• Don't treat XMR and ZEC as one bet. With a 0.12 correlation, they barely diversify each other's risk and barely share it either. You're holding two different assets.
• Size Zcash like the volatile asset it is. As an example, a $1,000 ZEC position at the top of the Sep 26 peak would have lost roughly a third of its value by Oct 18.

If you trade

• Zcash's 0.54 correlation with Bitcoin means BTC weakness is a real input for ZEC. Monero's 0.29 means that signal is much weaker there.
• Expect ZEC's daily swings to be big in both directions. Its best day was +24.8% and its worst was -11.2%. Stops set for Bitcoin-sized moves will get hit.

If you wager

• Any bet on Zcash's price over a short window is a bet on a coin with 120.4% annualized volatility. That's about three times Bitcoin's. Wide outcomes, both ways.
• Don't assume a 'privacy sell-off' will drag both coins down together. This window says they move independently.
• Keep stakes small. As an example, a $10 or $100 punt is a sensible ceiling for something that can move double digits in a day.

The open question is the one we couldn't answer. When Zcash dropped 11.2% on Oct 8, was that a thin book giving way, or just a crowd of profitable holders selling at once? Until we have spread and volume data to put next to these prices, nobody can say for sure, and anyone who claims to know is guessing.

How we did the math

We used daily closing prices from our own price history over the 90 days ending Oct 29, 2026. Volatility is the standard deviation of daily log returns, annualized. Correlations are Pearson coefficients on daily returns, and drawdowns are measured peak to trough on closing prices.