In the cryptocurrency world, 'trading liquidity' refers to how active a particular cryptocurrency is being bought and sold in the market. In simple terms, it means how easy it is to buy or sell. Take Binance as an example: major cryptocurrencies like BTC or ETH have high liquidity because many people trade them daily, making it quick to buy or sell, and their prices are relatively stable. However, for lesser-known coins, poor liquidity may result in difficulties in buying or selling, or significant price fluctuations. Many people also consider liquidity when choosing cryptocurrencies to avoid stuck orders or excessive slippage.