the way the market crash in the history has very good impact in the economy. This is the stage when some become broke and some billionaire. This teaches each investor to invest wisely and choose the right topic for his sector of investment. For the one who becomes rich in a crash they need to worry about their future.
a market crashes when it's foundation is an open space full of people's feelings and opinions
they may not be the only one who need to worry. There are others too in the line who need to worry. Of course the customers donot last for ever ,business might need to go down or up. And of course crisis is too a part of future
The best time to invest is during the crash. The people who are patient enough to wait when stocks are cheap and then invest are so rare it is incredible. Most of the professional fund managers in Wallstreet are in the market at all times moving money back and forth so they are unable to wait for times when stocks are cheap. They hold mediocre companies at high prices so they don't lose customers. From time to time there are companies that are temporarily out of favor by Wall Street, that are great companies and are cheap. Be greedy when others are fearful and fearful when others are greedy.