To be honest,bitcoin is a digital currency that will last forever.If you watch bitcoin has been subjected to severe bear market in the past and this resulted in many people speculating that bitcoin will vanish, but at the end ,bitcoin keeping surging and waxing stronger.
It is this mindset focused on if bitcoin will last forever or not that made some people that bought btc at price $14 to sell ,hoping bitcoin will vanish.
On the other hand, many big institutional buyers have been making a move to ensure bitcoin  futures are traded on its exchange. So,anyone  one one saying bitcoin will not last forever is like telling me internet.