Why would anyone buy into U.S. stock market now rather than waiting for it to tank when Trump tries to fire Powell (not political)

For those on the sideline, why would you go back in before the market reacts to the president attempting to fire the Fed chief? The act will likely shake confidence in the US system and cause stocks to drop and bond yields to spike. The safe bet seems to be to be believing the president's words and waiting for him to try to fire Powell before buying in.