when 1 coin dump./ people will panic sell. then I buy wait a small correction. just say 5% is good for me. and sell all. when 1 coin pump and people say a lot about it. I buy and wait 5% then sell. follow my path you will see result
I think it will be a gambling to just wait for a pump to come and so that your coins will be multiplied positively.
If someone is consistent in his business he will avail the opportunity when it comes but it will be not wise to just wait for the pump.
There may be certain parameters which may be indicating to the rise of value of the coins as when the purchase of the coin increases it certainly shows that the investors are attracting to the coin and so its price will go up in the market.