Never heard. But...i cannot say that i know a lot of crypto and i am a clear professional in all of this stuff you know. I'd rather call myself amateur, who is willing to know more about crypto and how it works. Now i can say that i can gain more and more knowledge and learn how to use some exchanging platforms, like https://kuna.io/en/ in order to sell or buy crypto. There are nothing hard there, as all you need to know is the price. The highest sell price is good, the lowest price when buying is good. Everything is simple here i would say