It made world crazy cause of its fast pump, after that it made people crazy cause this is totally new way of earning some money, you just invest and hodl your coins for some time and after it you can collect earnings, most of the people never heard about "things" like that and that is why people are crazy.
Why not? It provides hope for everyone, opportunities and many more advantages so people are now craving for this kind of opportunity and innovation, at first they are ignoring this but when they found out the advantage of it they become very much happy that they tried it, I have not seen people disappointed in joining bitcoin world.