I think No, because as you see right many people use to used and earn in bitcoin. But thats only my perspective but i also think it is possible that bitcoin will this disappear in the future but be positive as long as bitcoin is here and help othe people by doing this kind of work
I also do not think so, because still bitcoin is very young and still most of the people do not know about bitcoin, i think that now the bitcoin users are increasing because its popularity is increasing throughout the world, i think that bitcoin will be the first choice for the people to use it for shopping online as well as for shopping offline.
Till date bitcoin is not fully prevail in the world and you are talking about disappearance. Dont be panic about the future of bitcoin. All other currencies will disappear in the future because of cryptocurrency, because it is better than paper and fiat currency. No need for any exchange if you want to use your bitcoin anywhere in the world. Just one click and you will pay your bills.