to do that. And / or the opportunity to spread FUD or positive rumours
with wide media reach.
To manipulate the prices of bitcoins is not is a scope of a common man. Even if you have 100 or 1000 Bitcoin it is difficult . In order to do so you need a big community of bitcoin users like currently Chinese are purchasing like madly and it has effect on the price of bitcoins. So in order to manipulate the bitcoin price we need a whole lots of bitcoin users with lots of bitcoins with them and all of them has same intentions like buying or selling at the same time.
I think there's one more because most of bitcoiners are joining on the crowd if it goes up more possibly others are buying until halving is not end .then if it goes down they follow to sell some coins and then buy again .that was the flow right now so if big coin holders also do that .it will as easy to manipulate those fluctuations.