Minor cases happen when the coins pump again giving profits but majority of times, people end up buying lower volume coins at the peak which would hardly be reached again which would indeed leave them with loss only.
Majority of the signal groups thrived during the past years before the big rally and many looted innocent users in the name of giving them guaranteed signal and there were manipulators who thrived on low volume coins and when the market went down these signal groups died along with it and i will not be surprised if these group emerges when the market rallies again.