Trading pumb and dump signals. Is it true?

Hello guys. I have some answers to you. Nowadays there are many crypto pump and dump signals chats in whats app, telegram, and other messengers.
Guys make busines in busines its funny and good ofc.
There are many fake signals which make newbies take high and sell low. So they lose their deposit and going out the window.
A liitle part of people take profit when take crypto in 2-4 hours before signals. It looks like a pact with big traders.
Do you believe in signals group and have some good profit?