It's not. There are only so many human minds with the means to affect the price. And in the last few years the deeper concept of bitcoin has reached pretty much all of them. Before moving the bitcoin price was mostly about introducing bitcoin to new minds with the means to affect the price. Now you don't have many of those new minds left. Now, moving the price is about un-hardening already hardened opinions, old minds, a much harder task.

People forget that the price of bitcoin comes down to the personal opinions of a fixed number of people. The price of any money does.