Religion will be less and less involved in our lives expect in third world countries...
Lol third world countries are more involved in religious activities compared to developed/bigger countries because they care about their souls and not about materialism.
But of course things are different in other locations as there will be bad organizations may rise in future or sooner
What will be the largest religion in 2050?
Given the birth rate and youth of the population, it will obviously be Islam.
Time works for them, you might say

Agreed on you here mate because Muslim has strong family bond thats why their religions stays with them until death and very fees are converting to other sectors,not like others