i joined some paid group but they gave me some good and some bad signals too.
I also joined some signal groups, the result is the same as yours. Since it is a prediction, there should be no 100% accuracy. The signal can be true or wrong at any time. So, you also need to understand and analyze yourself as well. Don't instantly follow the signals before you do your own research about a certain coin they recommend for buying. If you saw bad news about the coin, just ignore it.
right, the need for confidence to decide something in trading. Even professional traders, they don't necessarily do all the correct analysis, but they can still survive because they can control their emotions and dare to cut losses when they realize that the analysis is wrong.