It depends on which of the indicators that will work for you, and that you can understand easily when using it. It is good to try various indicators during when you are learning to see that which is good for you when trading.
If someone use multiple indicators, they must know well those indicators. It doesn't make sense if they use the indicators but they don't really know it them. Well, it is good if someone use multiple indicators in trading, it must increase the accuracy when we analyze certain coins. More indicators means a deeper analysis on the coins.
I don't like using multiple indicators because it will complicate things for me. However, some traders uses multiple indicators when trading. Test them and find out the one that is cool with you.
Why it is complicated?
If you often use multiple indicators, you won't feel it is complicated anymore.
Just try to use more indicators, I think it won't complicate you anymore after you apply it for few weeks.