To be honest, I saw a lot of new casinos with amazing sites and even licenses, but so far I have no confidence in them and only test their free games where possible.
This is the biggest problem for new casinos as they have to provide amazing offers to attract players but as soon as the promo expires players start to leave the casino and this is also a reason why there are not many trusted casinos as there are for fiat currencies.
To enter real money there I must be 200% sure that there will not be any problems. and this is difficult to understand because there are very few reviews on new casinos.
Exactly and the casinos should focus on how to earn the trust from the community which can be done by doing certain competitions/campaigns which make people believe that the casinos is serious and if they are giving away 1-2 BTC in giveaways then there is no reason for them to scam with my 0.02 bitcoins.
I cannot recall too many good casinos which have started recently and are successful so yeah it is hard for new casinos to make a name for themselves when such giant casinos already exists.