If around 21000 is to be top (according to Fibonacci).
We need a massive strengthening of the US Dollar.
The chart below is a prediction (based on a descending triangle), that if the US Dollar Index were to break below 78.3, it will fall catastrophically to 67.
And if that happens, all kinds of crap will be forced sky high.

My guess is the US Dollar index will strengthen. Stock Markets around the world is driven by no attachment to future earnings.
Beware everyone. Keep an eye out for the USD.