So far, I use the gas zip site to use their swap service, and the last time I used it was still safe and fast, but even so it is better not to use such a service with money that can not be willing to lose, use it in moderation, because it could be in the future something bad happens to the swap service site, and we don't know when it is. Some time ago I made a thread on the Beginner & Help board regarding the site I mentioned, maybe you can visit and pay attention to it: Alternatives for Exchanging Tokens or Coins from one network to another