Long time lurker here, thought I would drop what I look at before signing up anywhere. After a few bad experiences I stopped trusting the big banners.
First thing is the licence: see which authority is listed in the footer, and whether they actually accept players from your country. Next come deposits and withdrawals: crypto is a plus but not a must, and the withdrawal limits need to be written clearly.
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 useful overview with bonus rules, app info and payment methods is worth a read here [url=https://ourfathersfamily.com/blogs/153571/Rolletto-Real-Money-Gaming-in-2026-A-Practical-Player-Guide]rolletto withdrawal times[/url] and it saved me some time.
I play almost only on my phone, and if there is an app I make sure it comes from the official page. Ask support one simple question first: if they answer in a couple of minutes that is a good sign.
Anyway, that is my routine. Only play with money you can afford to lose.