What Bitcoin exchange company comes highly rated to buy and sell?

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I would recommend Bittrex. Has a huge collection of altcoins and it's relatively easy and user friendly to navigate through and perform your transactions. For more info you are most welcome to join our highly engaged and active Facebook crypto group for more insights, analysis, discussions, ICOs, trading, predictions, bitcoin, altcoin and news: https://www.facebook.com/groups/cryptofans/