To protect ourselves from a crash, people could identify the risk before investing. Identifying and managing the risk has to be a must before investing to protect ourselves. The price and the market behavior is something that you cannot manage or change, the only thing you can manage is the risk, so before investing make an investing plan and manage your risk. In the other hand, taking time to study about the project you would like to invest would be advisable, investing in good projects is as important as managing the risk.