I had some words for you friend.Bitcoin is decentralized currency,so no one will control the bitcoin price.You no need to worry for this,it's minor fluctuation.The whales can hold the price for a moment.But they can't control for longer period.This is the unique features of bitcoin over other Crypto.
I agree, it's decentralized and very hard to manipulate but whales still do it and when they do prices skyrocket or dip. Either case is a chance to make money, either by accumulating cheap BTC or by selling when reaches it's peak. Whatever the case is, BTC will exist for a long time or maybe even forever.