Is it possible and legal to open an online casino without a license?
I have heard that a license only allows to put users in confidence
What do you think about this?
Licenses are important, not only to increase the trust of users, but also to see to know that the platform is worthy to use, safe from scammers, and safe from hackers. The license not only checks the owner of the platform, but also checks the security level of the platform. If you open an online casino, what can you show as proof that the platform is worth using? Of course the license. Not only gambling platforms, exchange platforms, wallets and so on also provide licenses to provide evidence that the platform is feasible to use.
Gaining trust can come in so many forms not just having a license alone. If I ask you, will trust a newly opened casino that has a license? I bet you will hesitate to deposit and start playing there but you will trust more those have existed here for quite some time and don't have any serious negative feedback.
Having a license can make a site more regulated, making those scammers and fraudsters easy to detect but having a license won't instantly make a gambling site hack resistant. Proposing that your casino has a license seems not enough to convince people to play at them but you should also propose if what features you are offering and why it is different from other existing casinos.