I entered Crypto market for 2 months and usually see the term "pump and dump", and some P&D groups. But i wonder they pump by selling and buying themself, so when price go up, who will buy it for them and they sell that for who???
With Blue-chip coins, someone could buy when it've pumped already because of good news. So with trash coins, who'll buy this pumped coin and why many PP&D group still live until now

I'm glad you knew that PD selfish groups, don't you try to come across nor turn your interest on their useless coins, the only thing that they want is your money to put on a specific coin that they are pumping, wait for the signaling reasonable drooling price that makes their eyes look like a USD dollars then the whole group or bots will sell their coins simultaneously leaving their nesting trap coin dump. That is their common tricks to attract investors and newbies in crypto world.