where can I read about cryptocurrency payment gateway?

And hello to you, well, in general, there is a lot of interesting material on this topic in the search engine, so you could google the options for yourself. Of course, if you have already tried, but could not find anything interesting, then I can recommend you to read about the cryptocurrency payment gateway on the Yahoo Finance project website. Everything is described in sufficient detail there, so after reading the article, you certainly will not be left with questions. I hope I was able to help in this matter. Good luck with your study!