Can you think of possible reasons why Bitcoin could be gone, banned or lose value?
It would be possible if there would be no people to use it anymore and there is no internet then bitcoin will go down and will definitely become worthless. I think this would not happen they are only saying that bitcoin will disappear because bitcoin has been grow and become popular so with the use of their opinions the number of people would no longer use it.
I don't know why, but your comment have most logic then any other. If people would stop to use bitcoins that would lead to crash, but why would people stop using bitcoins? Well probably answer on that is simple, people would stop use it if there is something better then bitcoins, there isn't so people will use bitcoin for a long time. Bitcoins are better then traditional fiat currencies, we waited for a long time for alternative and we finally have it, no one will stop using bitcoins.