If Bitcoin price pumps from $1300 to $3000 in few hours, nobody would make profit from it, because the exchanges wouldn't allow you to sell your Bitcoins and make the fast profit, it would bring a big loss for exchange sites.
Do you agree with this?
A pump like it is not going to happen if an altcoin pumped form 1 dollar to 3 then the amount of money needed to make that pump is small, if bitcoin pumped from 1000 to 3000 although in terms of percentage it is the same pump, the amount of money needed for bitcoin to make that pump is incredible, so while what you are saying may be true such a pump is not going to happen in just a few hours.