I will give them last part of my trust for anything not only for property. Seriously they think about their own benefit first and for them people on the earth comes later.
One of the biggest reason is Dubai is a tourist hub, people are coming here from different countries of the world and businessman are investing money in this city so commercial property value is very high here in Dubai.
Its 2015 and international city is the cheapest area to live in Dubai specially when it comes to family people who are having families here and cant afford to live in center of Dubai.