The casino did not change his fortune, his character did, if he has a weak character since he already won a big amount then he will just continue playing and will come to think that he can win more, but that is not his mindset and his character he went back to his company and through his perseverance and hard work his company becomes a huge success.
In reality, it's so rare to make a fortune in gambling, this guy happens to know limitations in tempting luck so he stopped at the right time.
I tend to agree with you, the @OP is just similar like pointing anyone if Bitcoin can save the world, but Bitcoin is just a currency and there's no free Bitcoin donation to poor people. I wonder how he can stop at $27K because his bankroll was $5K, obviously he should have $6K, $7K and so on until it reach $27K. The way he limit himself to not gambling more is a good decision and that's why his company is still survive until now.
A businessman must have a good decision and planning to make his company survive.