You can exchange cryptocurrency at the best rate through CryptoXchanger decentralized platform. There is no 3rd party, so you no need to worry about your investment. Each and every user holds the private keys of their coins.
Besides buying, the platform allows you to earn the profit by making an investment. They are offering daily accruals from 2% – 6% on your investment, where your deposit will be included in that accruals. For regular investors, they have been providing referral bonus of 7%, 3%, and 1% and for the partners 10%-5%-2%-1% respectively.
It has been participating in the recent ICO sale, where the next coin crowd sale starts in 23rd November 2017. They are in the plan to create the blockchain base exchange and wish to implement all the features that centralized exchanges afford at present.