Yes, no guarantee for who will win and who will lose. So that is why if we have a chance to win and really gets the money, we must use that for our own good. We could use that win money to create other businesses that we want so we can earn more money and if we are busy with our business, we can reduce our gambling activities because our business now becomes important to us. Gambling winnings will comes to those who deserve for the winning so that is why we don't have to chase the winning and let the winning come to us.
The guarantee that will definitely happen is the defeat that will be experienced by most people who gamble. 
Winning in gambling is difficult to get, so it is unlikely that we will be able to get a big win because in my opinion, to open a business, of course, not only with the usual wins because that might not be able to help completely.
but I agree with saying that we must be able to take advantage of the wins that have been obtained and no matter how much, like what I do is when I gamble and the balance I have is twice the capital I allocated, then I won't think twice about cashing it out.