Friends are not who can not control the manipulation, except for those whales who manipulate the market. We cannot influence this. And even if there is a law that will control manipulation, every law still has holes to obey it.
I do not agree, because if you do it together (group) anyone can manipulate the market. I mean, even though it only has a small impact but if done simultaneously this will be very strong. While to prevent manipulation the only way is set limit the purchase of cryptocurrency. But this is very impossible, considering crypto is decentralized not centralized.