They wont ever die.
Religions are based on phenomena that people cannot explain.
By justifying the impossible by an omnipotent being, comfort ensues.
Religions will eventually die. In the Western nations, the number of people who identify with a major religion is declining with every new census. On average, less than 10% of the population in the European Union attend religious services regularly. WhatsApp and FaceBook are having more followers than Christianity and Islam right now.