I actually think you might need a long time to understand this. Understanding the start and end of bear/bull markets is not really that easy and once we claim to understand it we can stay out of risk of loosing our funds in a dump.
peoples usually try to understand these markets and they consume a more than predictable time which than makes them bear the losses and consequences.

Bitcoin markets are much unstable and also are not that trustworthy. They can anytime move up or move down which can give us a major loss. Even if we are an hour late, we can see the price reaching the dip. This usually demotivates most of the traders and they get afraid of the bear/bull markets.