All religions started out as a cult. Christianity was a cult until it won.
The difference between a cult and religion is the same as the difference between a molehill and a hill. It's hard to say exactly when a molehill turns into a hill, but you'll know it when it does.
> All religions started out as a cult.
Beware of survivor bias. Even assuming that all religion were once cult it still does not follow that all cults could become viable religions.
The difference between a cult and religion is the same as the difference between a molehill and a hill. It's hard to say exactly when a molehill turns into a hill, but you'll know it when it does.