There are two ways on how you can buy bitcoins in Dubai.
Local Bitcoins - LocalBitcoins is a peer-to-peer Bitcoin exchange. We are a marketplace where users can buy and sell Bitcoins to and from each other. Users, called traders, create advertisements with the price and the payment method they want to offer. You can browse our website for trade advertisements and search for a payment method you prefer. You will find traders buying and selling Bitcoins online for more than 60 different payment methods.
Visit their website here https://localbitcoins.com/
BitOasis - is the first digital currency wallet and exchange service in the Middle East that enables you to buy, sell and secure bitcoin.
You can now also buy and sell Etherium (ETH) in BitOasis Trading Platform
Visit their website here https://bitoasis.net/en/
Personally, I prefer to use BitOasis, it's easy to use, fast and way better exchange rate.
See for yourself...
I would like to hear from you guys, specially those steemians who are living in dubai, how do you buy or sell bitcoins here in dubai?