False advertisement by some of the activist part of the Bitcoin community:

They lie knowingly.

Bitcoin is space and (energy/time, choose your compromise between these two) inefficient.
It will fail, and when it will happen, it will be later than it should have been.

I also saw a picture of Buffett doing the baphamet sign, and if it is not photoshopped, it should be the only picture people should use when they show any picture of him.