Bitcoin and Ether Liquidity Rebuilds One Year After Flash Crash

One year after a historic flash crash wiped out $19 billion in leveraged positions, market data shows a stark divergence in liquidity recovery between major cryptocurrencies and smaller altcoins.

According to CoinDesk data, order book depth for Bitcoin (BTC) and Ethereum (ETH) has grown significantly since the October 10, 2025, crash. The gains hold in dollar terms, indicating an influx of capital from market makers rather than just a reflection of lower coin prices. Liquidity for both assets is now deeper than it was on the crash day and at the start of both 2025 and 2026.

In contrast, altcoin liquidity has moved in the opposite direction. Dollar depth for smaller tokens has been eroding steadily since early 2025, a decline that was masked by falling token prices. This suggests a more fragile and less supported market structure for assets outside the top two.

Overall weekly spot trading volume across crypto markets remains nearly two-thirds lower than its peak during the crash week, though it has roughly doubled from a low point in August 2026. The data paints a picture of a market where capital and confidence have returned to the largest, most established assets while continuing to retreat from riskier segments.