Yeah, i know some of my friends that do gambling very professional with high profit everyday.
Yap, also many people here do gambling and get a big win. But not all to survive for long time.
Just people a profesional in gambling always survive.
I dont think that there is a professional player here in bitcoin except the huge bankroll one. Most winners is the one that have more money to play so they can sustain their losing streak. The rest is just play by using their luck