To be honest, the question is a bit strange. It is unlikely that anyone can control the market entirely, but it can be regulated. And many people know the keys to this.
There's plenty of market participants these days compared to the early days where just a small fraction of investors and traders had the biggest say on where the next direction of the market would be. Even though there would still be big boys and whales in the market, I suspect that their dominance will keep on reducing as more and more people gets involved with Bitcoin and the crypto space.