If you ask this question then it only means you cannot take advantage of it. Because it is not easy as eating pizza pie. You need to study trading in order to take advantage of BTC pump and dump. Even studying is not easy too as it takes a lot of time, effort, patience and determination. And when you are ready, you won't ask this question again.
Some peoples are beginners in crypto trading so they are all don't know how to fluctuate all the time. Bitcoin is always fluctuate because it is volatile crypto currency so market is moving forward and backward. It is a decentralized cryptocurrency so no one stop the fluctuations but any government can add some regulations and it will never affect the Bitcoin.