In reality, this does not happen as very few people buy at these low levels. When the market is dumping, people also panic sell, and therefore we see key support levels being broken downwards. People have the habit to buy when the crypto market is going up and most of the people try to jump on a running train. It's strange that people are not buying at 27,000$ but when it will reach 40,000$, people will buy bitcoin as they do not want to miss the rally.