There is nothing wrong with being bearish, an insane frothy market. Actually, a 10 -percent correction would be a good thing for the market.
Jesse Livermore, in early 1929, amassed huge short positions, using more than 100 stockbrokers to hide what he was doing. By the spring, he was down over $6 million on paper. However, upon the Wall Street Crash of 1929, he netted approximately $100 million. Following a series of newspaper articles declaring him the "Great Bear of Wall Street", he was blamed for the crash by the public and received death threats, leading him to hire an armed bodyguard.