Bitcoin in the next five years. It may become the mainstream payment method. But to turn into that ,bitcoin needs to make itself familiar to the large section of the population. Take for instance , credit/debit cards. People are familiar with it ,which is why they put their faith into it. Bitcoin needs to remove the mysterious air around it. Only then i believe it can grow and develop.
don't think bitcoin will lose the mysterious for quite a long time as people who do find it mysterious don't know what bitcoin is. it doesn't cost a whole lot time to get to know bitcoin. but they must be willing to do so.