you need to have inside knowledge of which coin the group is going to pump and buy loads of that coin before the pump, and most people do not get this information like less then 30sec or less before the pump, so most people will end up holding the bag once the people on the inside sell their coins for a huge profit,, most pump and dump only last a few mins or less... you have to be very lucky to make good money from this.. just becareful so you are not the people holding your expensive coins in the end once they have gone down in value again.. most pump and dumps are with shit coins.