Yes, it is true that the testnet dex is very handy and worth trying. It is a great way for newcomers to get familiar with the cryptocurrency trading process without having to risk any of their own funds. The testnet dex provides a safe environment for users to learn the basics of trading, such as setting up orders, analyzing market trends, and understanding the different types of orders. It also allows users to experiment with different strategies without having to worry about the potential losses that could occur in a real trading environment. Overall, the testnet dex is a great way for newcomers to get their feet wet in the world of cryptocurrency trading.