Factors affecting the liquidity of cryptocurrencies:
Trading volume:

Cryptocurrencies with high trading comprehension tend to have greater liquidity. The large number of transactions means that one can easily buy or sell without significantly affecting the price.
Market depth:

Market Depth refers to a small number of buy and sell orders at various price levels. Deeper markets have more orders and result in less price fluctuation when executing trades.
Exchange listings:

Cryptocurrencies that are traded on multiple major exchanges have greater liquidity as they can be bought or sold across multiple platforms.