I don't know when bitcoin is disappear or replace but I think the bitcoin is not forever because no forever. Like said the teenagers because they are hurt by their boyfriend or girlfriend. For me, the bitcoin is not forever, the other bitcoiners taking advantage because other countries against bitcoin they think that the other countries destroy the bitcoin so they sell account to earned more money.
I think bitcoin is permanently planted in our country and our society. Bitcoin will be continuesly and it serves many people in order for them to solve a financial problem and help them to answer there basic needs..
Bitcoin has got implemented around the world, but haven't gained much popularity. Now the adoption keeps on increasing making it reach lots of people as the market too support bitcoin through different marketplace. From this regard, bitcoin is always the leader.