Will Islam become biggest religion in the world?

 

According to some estimates, there are approximately 4200 religions in the world. In that Christianity have majority of population consisting of 2.2 billion Christians around the world till 2010 and 

by 2050, the Christian population is expected to exceed 3 billion.

In 1990, 1.1 billion people were Muslims while in 2010, 1.7 billion people were Muslims. Studies in the 21st century suggest that, in terms of percentage and worldwide spread, Islam is the fastest-growing major religion in the world. Another religious forecast for 2050 by Pew Research Center concludes that global Muslim population is expected to grow at a faster rate than the Christian population due primarily to the young age and high fertility rate of Muslims. 

In 2010-2015, the expected Muslim growth rate was 1.8%. This compares with average world population growth rate of 1.2% per year for the referenced period. As of 2015, it was predicted that the world's Muslim population would grow twice as fast as the overall global population in the following decades.

As per some researchs if the growth rate of Muslims keeps increasing , by 2050 Islam will be the biggest religion having majority of population. 
But many researchers think this growth rate will have no impact on population to become majority. According to pew Research , religious conversion has no net impact on the Muslim population as the number of people who convert to Islam  is roughly similar to those who leave Islam.

Many researchs were taken ,all researchers have their own theories but there is no any concrete proof to prove this future happening.