Imagine if a publicly traded company announced that in 1 years time, they would buy back half of their outstanding shares (not a great analogy but its the best I can think of). What would happen to the stock price?
All securities prices in publicly traded markets are essentially priced as discounted cash flows over the next 20-30 years. The current price reflects all available public information about those cash flows.
I'm not saying efficient markets is 100% true all of the time, of course the world demonstrates that it isn't, but the level of disbelief you have to have in the hypothesis to believe that a well-known public event affecting Bitcoin will result in a 3x price increase is lunacy, IMO.