In my observation in bitcoin price !!
I think the WHALES are the manipulators of shifting price of bitcoin and alt coins
Why?
Because whales are buying huge amount of coin, in this case there will be a sharp rise in prices and also because of this demand will increase and many investors will be able to invest, so the outcome is,WHALES had a large profit on their money or capital, i think this is why the alternative currency increases.
and after they buy it they will sell their coins that will cause a sudden fall in its price of alt coins.
This isn't something new. Whales always had the ability to move markets in the crypto world. This will change with increase in liquidity of the markets. Altcoins are less liquid than the Bitcoin market and will always be susceptible to pump and dump schemes.