(Bloomberg) -- Helping businesspeople try to optimize their performance by using hallucinogenic drugs is an eccentric and growing offshoot of the unregulated $5 billion field of executive and life coaching.Most Read from BloombergOne of the Most Infamous Trades on Wall Street Is Roaring BackStocks Kick Off Key Inflation Week Under Pressure: Markets WrapThese Are the Best Countries for Wealthy Expats‘Oppenheimer’ Wins Seven Oscars Including Best Picture, Director“Adderall, caffeine and stimulants