UAE is one of richest countries in the world, if there are 72% local users buy Bitcoin, why the price isn't increased? 
The Op quoted it wrongly, the article says that 72% of those who use crypto use Bitcoin, not 72% of the total population. UAE, Qatar and Saudi Arabia are the too countries in the region with the intention of dominating the future market in several industries, not just reliant on oil. Bitcoin has lots of prospects for the future and they want to be ahead of that curve too.