Not islam, but Pentecostalism is the most succesful religion on earth. It expands like a global brand, efficiently evangelising the planet. 25% of the 2 billion Christians in the world now belong to a Pentecostal church and 35,000 new members are born again through baptism every day.
Wealth is good, so why not pray for a raise or a promotion at work? (English subtitles available)