I dont know much technically but think any wallet that custodys our sats could probably in theory rugpull them. All I know is coinos fees are very low, it can be used on any browser and I have always has very good response from Adam if there's ever any problem. I just want an easy to use LN wallet with low fees and coinos does that very well for me...so far so good anyway. Obviously never leave a lot of sats sitting in wallet where you dont have direct custody of the sats.