One year after the 10/10 flash crash, bitcoin and ether order books have rebuilt to levels deeper than before the event, according to CoinDesk. Altcoin liquidity has not recovered the same way, a gap that matters for anyone trading outside the two largest cryptocurrencies.
What actually happened
The 10/10 flash crash struck crypto markets on 10 October 2025. One year later, on 10 October 2026, CoinDesk reported that bitcoin and ether order books are now deeper than they were before the crash. The same report found that altcoin liquidity keeps eroding over the same period. Spot trading volume across the market remains well below its October 2025 peak, according to CoinDesk. The report treats bitcoin and ether as separate from the broader altcoin market in its liquidity comparison. It does not give specific depth figures, volume totals, or name individual altcoins affected. No traders, exchange executives, or analysts are quoted in the available report.
How we got here
Liquidity crises reveal which assets have strong market-making support and which do not. The 10/10 flash crash tested this across the crypto market on 10 October 2025. Exchanges and market makers have spent the past year rebuilding order books, according to CoinDesk. Bitcoin and ether, the two largest cryptocurrencies by market value, appear to have benefited most from that rebuilding. Altcoins have not followed the same path. The report gives no detail on which market makers returned, how depth was measured, or which specific altcoins lost liquidity, leaving open questions about the mechanics behind this split.
Why this matters for you
For holders of bitcoin and ether, deeper order books mean trades of meaningful size are less likely to move the price sharply. For altcoin holders, the opposite applies. Thin liquidity makes it easier for a large sell order to cause a steep drop, and harder to exit a position quickly during stress. Builders launching new tokens face a tougher environment for attracting market makers willing to maintain tight spreads. Traders moving between assets may find it cheaper and faster to transact in bitcoin and ether than in smaller tokens. Anyone holding a diversified altcoin portfolio should weigh this liquidity gap when sizing positions.
The bigger question
If liquidity keeps concentrating in bitcoin and ether, what happens to the thousands of altcoins that depend on active trading to stay viable? A market where only the largest assets have deep order books could change how investors think about diversification. It raises a broader question about whether the crypto market is consolidating around fewer liquid assets, and what that means for the long tail of tokens built for niche use cases rather than broad trading volume.
What to watch
No specific follow-up dates are included in the available report. Market watchers will likely track order book depth and spot trading volume in the coming months to see if altcoin liquidity stabilizes or keeps declining. Bonuz will continue tracking these liquidity trends as part of its ongoing crypto market coverage.
