Greediness is a natural characteristic of humans. We want to have more than we have now and we want to recover what we lose. After all, many of us want to be a rich person they dreamed of.
Well that is what every body wants and every body is taking the risk in playing gambling because people didn't realized how does gambling works and they think that gambling is just for fun others think they can profit fast because of gambling well they are all wrong about this.