If a world crisis were to happen, I am sure some percentage of the population of the world would resort to converting their wealth to cryptocurrency but most would go to what they believe is safe haven, which is gold and other precious metals. They would not even dare to take refuge of their wealth on btc and other crypto because they don't trust it yet. Probably if a crisis happened in the future, people might consider moving into btc if there are more crypto users by that time.