my question is can i trust these sites , which is on 2nd or 3rd or 4th on list of best sites , which is written by bloggers, keeping in mind that which have more referral commission is going to be in first places,
IMO you can. If a casino is 2nd or 3rd on the list it can't be a scam. Even a casino that is ranked 10 on the list is still good because it's above average since there's more than 50 crypto online casinos.
Try some of the casinos that advertise here on the forum. Most of them have decent traffic if that's what you really want. I don't get why you'd depend your trust on traffic, but do as you like.
The number of high rollers or big wins that casinos like to use for advertising doesn't make it better and won't mean that you'll win there. For instance Stake has a lot of traffic but it also has a lot of people posting bad stuff about it.
What I'm trying to say here is not that Stake is bad, but that a lot of people means a lot of sins and a lot of issues. Less people can mean less issues, faster response from support, and math stays the same. Your chances of winning in a casino with less high rollers and less traffic is the same.