When people see that it is realy to make money on cryptocurrency they want participate and buy crypto. But many people do not have enough knowlege for this. They see that another people make money and they want to make money too.
This is called FOMO syndrome. The most frequent occurrence during a large pump. Most newbies are subject to this.
I felt on myself this syndrome of FOMO and could not miss an interesting opportunity to make money at that moment when people actually earned money on the cryptocurrency market.