Most of the Cryptos are manipulated and a set pattern is quite evident on Bittrex

I was going through few of the graphs on the bittrex and there is a set pattern for the majority of the coins in terms of fluctuation of the value. There are a group/set of coins entitled for a growth for a particular day and coins grow at some pace/percentage , however after all of them reach at the pinnacle state ,all of them exhibiting the same pattern of downward trajectory. Few among them go beyond and above unexpectedly. My only concern is that, a consortium or group of people are dictating the prices and not to do anything with the actual demand/supply or rather the performance and actual technology of the coin itself . I may not be accurate on this above assumption but this is my observation personally.