A death cross signals a bearish market or asset and can be a good time to buy. Many investors purchase assets when the value of those assets has dropped, but with the expectation that the value will go up again in the future, based on their analysis. There can be many reasons why an asset drops in price, however, that doesn't necessarily signal a weak asset, but possibly a weak environment. Once the environment corrects, an asset can go up in value. If you manage to buy it on a dip, then you may see a return on your investment.