Newest casinos often carry with it a connotation of being untrustworthy or unreliable. This is not always the case as often online casino brands may release more than one gaming platform/brand to help target different regions and audiences.
If a new casino is registered with the relevant gambling boards and accredited appropriately, you should have no qualms about playing for real cash on these online casinos. New Casinos sometimes offer more attractive bonuses or offers to entice new players, so this can swing the odds more in your favor with a better no deposit bonus or free spins on registration offers.