Here are some that I know although there are many features that are important to a betting platform.
1. Mobile Friendly - there are many smartphone users around the world and many are travelling globally and they don't want to carry their laptop always. If I want to travel and at the same time gamble, I would choose to gamble in a site which is mobile friendly so that I can still gamble using my smartphone and that is one of the impt. features that a crypto betting platform must be.
2. Low to No withdrawal fee - Having a withdrawal fee in some sites are ok but too much is a bad decision that is why I see this as important too because gamblers will prefer to gamble in a low withdrawal fee gambling platform.
3. Lack of KYC - who wants to share their personal information to different people especially to the people they don't know?? None even me I don't want too that is why I prefer gambling in a site with no KYC needed.
There are two things I'd replace no. 1 and no. 2 with, which I believe are WAY more important than having a mobile friendly website and close to 0 withdrawal fee: security and legitimacy. I'd place legitimacy on the first place I believe, because there's no point in having security if the website isn't legit, right?
Then we have security, which is the most important part of a legit platform. You must be able to use it without having the constant fear of being hacked or the website being DDoS'd or that any other kind of attack might take place and might affect you. Placing some goods in a bank's safe has no sense if you have the constant fear of somebody opening it and stealing your goods - if it's not secure, don't do it.
A third one, before the lack of KYC, is in my opinion the platform's functionality. This one has a link to security I believe, and when I'm talking about functionality I mean having no bugs, glitches and errors is a MUST. You would never want a glitch to cause going all in instead of just betting a small part of your funds, and you would never want a glitch to cause the withdrawal to the wrong address. Right?
I believe these three actually link to each other. Having a badly secured platform is linked to its legitimacy, so is a glitchy one. So here is the "fixed" list, based on my own thoughts:
1. Legitimacy
2. Security
3. Functionality
4. Lack of KYC
5. Low withdrawal fees
6. Mobile Friendly