There is a minimal chance that this will happen but of course it could be possible, the bitcoin is already so big that it cannot disappear right away in my eyes.
It would take years to destroy it fully..
And I believe it will not happen soon, we will be enjoying more the benefits of using bitcoin. It is the new digital currency that is going to be useful for the people who love to transact online as it can help them save for the expenses on the fees, so I guess it will not be destroyed or will disappear, unless the government ban this.
Even though government would ban bitcoin there would be still transaction underground which we could really say that bitcoin would not disappear anytime soon as long its been used by people. You are right there are lots of benefits we could make in bitcoin thats why we cant think as of now that it would disappear.