It is impossible to know whether 'we're in a crash' because a crash can only be discovered well into into it or after it has happened.
True trend-followers will appreciate that all one can do is find a suitable trend - and follow it. Simple but I didn't say it was easy. In fact I will assert that true trend followers really don't care whether there will be a crash or the next market melt up.
What people (in general) want, is to be able to foretell the future. Sorry, they can't - and no guru has such powers. We might prepare for the future in various ways. This is not ordinary life. It's not everyday activities like trying to find the safest point in time to cross a road. The reality is that markets are wild random things - pure chaos of a different order - where the 'normal rules' we may apply in everyday life just fail miserably. As I've said in other posts, a whole new mindset is needed to manage this very different sort of chaos.
With 76 to -90% of real trader accounts consistently losing money (hard data), the battle is not with the charts or the markets. The battle is with yourself and your psychology.