There’s no crying in baseball—and no crying in the boardroom either, according to JPMorgan Chase CEO Jamie Dimon. In his 18 years at the helm of the world’s biggest bank, the Wall Street titan has cemented his reputation as an outspoken thought leader on finance and CEOship—and occasionally, the “pet rock” that is Bitcoin. When it comes to management, Dimon believes leaders should be willing to dismiss employees who aren’t a good fit—and even he was once on the receiving end of the firing gun.