This goes for any asset, manipulation via marketing and game theory is present in any market. People should always research the fundamentals and try to understand the thing they are investing in.
As an additional, we should look also for the technical analysis of each coin we are holding.. Its better if we learn all the basic knowedge and informations in regards of trading cryptocurrency.. This will help us to protect and gain more profits with our investments.. Aside from that, if we have enough knowledge with this matter we have a control with our emotions.. We can go with the flow... Just dont let your emotions overcome your intelligence..