Except for Catholicism which is sadly mistaken for Christianity -- THAT's going to grow and acquire power.
I seriously doubt it. They've boinked too many little boys and told too many women that they should be popping out a baby every year. And they are having a terrible time recruiting new priests, as well - all the young ones here in West Texas are Filipino, which is a culture shock for both the priest and the congregation.
They're losing their grip, rapidly.