I once hold a coin and suddenly the coin that is almost $1 dump to less than $0.01 to me I move on but to some people which are newbies this can discourage them from participating in crytocurrency and make them conclude it is fraud and that brought me to a question how do you think pump and dump group are damaging crypto-currency and it's reputation??
Most of the bump and dump group give the signals on some exchanges via their twitter or telegram channels usually. They cannot hold the dump or pump for more than 1 hour. As I checked one person this is the maximum time they can rule the price.
Do you want to find the bitcoin grow in the market means these group will not be a helpful one as I know.
They can only rule with the cheap tokens and cheap coins only.