Very interesting Bitcoin documentary. I'd say it is a must watch for those interested in cryptocurrencies. I do have to say that parts of it are in Chinese but subtitled in English. If English is a language you understand I'd say it's totally worth the read ;)
Oh, by the way, are you looking for a decentralized exchange?
Try https://bitshares.openledger.info/?r=sttcnstnc
Made by the creator of Steemit!