I think in the year 2050 the largest religion in the whole world is still the Roman Catholic because we know that is the largest nunber of members and most of the country now the population is christianity. Im a baptist christian they have same beliefs but we have different for the others just respect each belief about religion.
muslim is also growing and growing mate so i think they can be the largest in 20150 since we have 30 years more.
but for me?it doesnt matter what religion we are involving at,what is important our love for humanity and for the creator.