Yea, I hear you. But I think for something like the SNB de-capping, you were either on the right side of the event before hand, or you were not. It's difficult to predict (in my opinion) before hand what to do, or take some action during the event, since it's so instantaneous. You can hedge against the event, but then, you're holding a position in anticipation of (by definition) an improbable event, so you might incur pain while holding. Anyway, if you were short USDCHF, EURCHF, ect, before the decapping, you made money. If you were long, you got creamed.