I think it's just more simple to create an online casino based on blockchain, cause it gives more opportunities for your users.
Yes, since it is simple to create a online gambling casino , many people are misusing it to create scam casino and run away with people money. Although it is a blessing to have online casino to play gambling but at the same time, i have seen a lot of people complaining about it as many sites owners develop online casino to get people money and also do not provide probably fair games.
However, if a player loves to drive cars without insurance, he should be prepared to pay the price if accident happens!
