One of the most important thing is capitalization of cryptocurrency. But the trading volumes are very important too.
Capitalization and trading volumes are two different indicators. As a fundamental indicator, capitalization is more important for the investor, trading volumes are important for the trader.
If project has a good capitalization it means that the price of the tokens growth and it means that the project is in demand. If project has a good trading volumes it means that the tokens of the project are in demand.