No, the top investors will not always beat the market as their luck will wane at times. Even buffett is not spared but he has prepared for this by recruiting 2 capable fund managers to manage Berkshire portfolio

I expect a bearish market ahead thus bought a bit of proshares s&p 500 inverse etf to hedge. So far, it is in the money, I will wait for the big plunge and panic before selling this etf.