Even if you are interested no one can able to spot or guess on when BTC price would crash and no one would ever know it even on that one day that you are talking about.
People to make money out of those crashes.If we just think of the basic principle of trading which is Buy low Sell high then you would able to know on whats the answer of your own question.
Those crashes are indeed the opportunity to buy cheaper and in most traders this kind of spot is all we have waiting for.