All your reply looks just like speculation about the name of a platform. You can change words as you want but the main concept you can see on the website, even if it's made with WordPress which is a good CMS.
wordpress is not meant to be used to build a "trading platform", it's not designed for that.
I can't make you believe because the only way is to try. WordPress is a CMS and allows you to build any kind of website, including "trading platform", but all depends on your confidence in development. This platform doesn't meant very difficult functionality, so to store and process offers and bids through blockchain api it's completely possible as you see. I'm using microservices to operate with blockchain to get address information, build transaction on PHP side and send generated transaction hex to bitcoin node through api, it's not too complicated.