When it has to do with online Casinos reputation is everything. It is better to stick with Casinos with good reputations and account for your deposits, winnings and withdrawals because new Casinos cannot be 100% trusted. Sometimes this new casinos get tempted to deny the winnings of gamblers especially when they are big and when the no the have no regulatory body overseeing their activities.
It is true to say that reputation is everything in the business world because customers can trust their services only by having a good reputation. And if a new casino wants to build a good reputation but can't serve its customers well, this is questionable and we shouldn't be playing at their place. We also cannot immediately trust new casinos because they have not shown any achievements in terms of customer service. But we can play there and see how they will serve their customers.