Can a large school of minnows play the whales game?

[Sinistlercoin]

Theoretically, could a large group of people manipulate cryptocurrencies by planning to purchase or sell en masse?  In other words, could the members of this forum band together and schedule a mass purchase of bitcoin, ether, or another coin to manipulate the price, as it is speculated that a small group of wealthy individuals do with ther large holdings?