If there was to be a really significant crash in the DJI coming, one that would have decade long effects we'd likely have some clear early warning signs. The first would be a steep crash. This would be a hard crash taking the market down somewhere around 50%. The warning signs of that starting a a bit more speculative but that having happened is really obvious. We'll all notice if that happens.
In the unlikely seeming event that does happen, we should be extremely cautious of the bull trap formation. Hopefully this will not be relevant but I'll update on this analysis if any of the red flags that'd imply it may be valid occur.
See linked ideas.