I notice that when there the price is going up so many people are joining the train and they also buy because the price is going up and they are going to make a profit, why people are not buying when it is down when the price will eventually go up and they can make a lot of profit.
That is actually a bad way of trading since the most effective method is buying low and sell high. What is happening here is just a lack of experience trading in bitcoin or altcoins. If your a beginner or don't have a lot of knowledge in trading or about the market I think you would usually going to do this bad method and end up doing a bad decision and losing your investment by selling it at a low price. Probably a common mistake by the newbies. We all experience it and it's just frustrating when you did that mistakes that it why it is recommended to do a lot of research about where you are going to invest your funds.