<prompt> Human: On one hand, the mainstream good advice is to never try to time the market, and to never sell when stocks start to go low, but to hold through a crash and then only look at the long term gains. In a nutshell, never sell low, consider buying low, but not as a time the market strategy, just as a I have some money Ive been wanting to invest for a while, time to get in.On the other hand, when asked about the causes of a drop e.g. yesterdays drop, everyone mentions how investors are selling stocks to buy bonds or gold or safer assets. So... who are these people? Are they wrong in doing what they are doing? Why shouldnt I join them? Disclaimer: Im all for put money in, forget about it, look at whats there in 5 years, as this strategy is what all the data we have about the past suggests to do. However I would still like to understand who these people are that do not hold, and why.Edit: typos  <response>: So... who are these people? Are they wrong in doing what they are doing? Why shouldnt I join them? As Warren Buffett says, Be greedy when others are fearful, and fearful when others are greedy. 