

" An event or occurrence that deviates beyond what is normally expected of a situation and that would be extremely difficult to predict." (Investopedia).the answer is yes it would be a black swan event.
review the definition of black swan event.
Mine would be a mathematical relation :The next Black Swan event could be...
- A meteor/astroid hitting ... for example... NY... or... Israel... or...
- Discovering that gold is worthless b/c so abundant somewhere
- If Germany's gold reserves abroad cannot be located, ie. stolen....
- ...add yours...