Look at Craig wright, he sold thousands of bitcoin to drop the price, we are back up again. Which means they can influence it and even change it but can't control it, its in everyones' hands to actually control the bitcoin price
Craig Wright is a charlatan, a con artist, a clown, or whatever
But it is not just about price (or Craig Wright), even though it does ultimately come down to that (as the price, in turn, is the balance of supply and demand). You can influence Bitcoin indirectly in many subtle ways. For example, people
en masse don't think that altocoins can eat away at Bitcoin's value but I for one think they are mistaken in that case
In this manner, you can massively affect Bitcoin via altcoins and more specifically Bitcoin Cash. The latter has turned into a good speculative vehicle. I trade it and it brings good profits. but isn't it what Bitcoin was famous for? My point is that making a good rival to Bitcoin in the form of an altcoin will inevitably affect its value and market valuation (price)