You only rely on the trend? what happen if there's no trend for that day? Meaning you will not earn right? So better know how to work with it so that we can earn on the fundamentals if we want to spot the correct dump and pump scheme with bitcoins although the market is unpredictable but still we can earn with it and gain a huge chances since we know how to do a counter action when sudden changes appears.
That is why it is so important to spend all the time possible that you can to try to increase the accuracy of your predictions that way you will get a lot of confidence when you make your trades since you know that you have a very high chance of winning that particular trade.