thank you for the useful post, i gave also lost money at this pumping and dumping signal group in a telegram.they are useless and never join them.
You are right all of us should know about pumping and dumping of bitcoin if the price of bitcoin will be on increasing mode so it will be time for us to buy some coin for holding and if the price is getting high so then sell, for being a good trader we only need to have patience and never sell our coin at panic, it is very important to think without mind not with heart as emotions can make us suffer with lose.