Long time lurker here, so here is my short checklist for choosing a casino site. After a few bad experiences I stopped going by ads alone.
First thing is the licence: find the licence number and look it up, and if your country is on the allowed list. Then payments: crypto is a plus but not a must, and cashout times should be listed up front.
The welcome offer is where most people get caught. Anything above 40x rollover is a red flag for me, and the bonus usually expires in a week or two. A good recent review that covers all of this is worth a read here [url=https://motoride.sk/?login=PeterNovake991]Slotshopper Casino[/url] before you deposit anything.
On mobile I mostly use the browser version, and if there is an app I make sure it comes from the official page. Test the live chat before depositing: slow or scripted answers usually mean trouble later.
Hope this helps someone. Only play with money you can afford to lose.