price will depend on investors and traders demand.if its projects have good quality demand will growth.so prices depend on developers team how to deliver product to their investors.good product will be good fundamental for traders to buy token or coins.
You are right, the pump is actually built by the team and the community. how a team can make a plan to increase market demand is the key to price growth. especially for projects that have just finished ICO sales, because they do not have a strong community and market. then the possibility of maintaining market prices will be very difficult.