Blackbytes a privacy currency on Obyte. Blackbytes cannot be traded on centralized exchanges and can only be sent directly from one user to another. In the wallet's Bot Store, you can find chat bots that provides simple order books allowing users to find others to trade with. Keep in mind, that by using the chat bot, a small part of the privacy of course is lost as the bot operator will be able to see which addresses are used to send blackbytes. Read more about Blackbytes.