Ok, how can you disprove EMH without a profitable strategy? I'm aware of a few mathematical techniques for proving something exists without actually building it (probabilistic methods, baire category theorem), I can't see how any of them would apply.
Also, the statement that "X will go down but I don't know when" isn't really a prediction - it's more of a truism.
Your argument is more like a quack who prescribes magnetics for cancer.
When someone objects to the claim, quack say "well, prove your claim by showing you can heal the patient right now".
Taleb, Mandlebrot and a number of others have gone over the fallacious quality of EMH claims and it's been over a number of thread here, I don't have more time it now.
Also, the statement that "X will go down but I don't know when" isn't really a prediction - it's more of a truism.