I think not, in the coming decades or more. Also, since bitcoin has already been available on many storage or node, the only way for bitcoin to fully disappear is to wipe off its data in existence which is highly improbable. As for the user base, it could be decreased too, however I think it wouldn't be possible for the user base to disappear abruptly.
Yes i agree with the fact that bitcoin is still growing and already its becoming more and more popular and is on the progress and stores in developed countries started accpeting bitcoins and in the future its adoption across the world would increase even more.So for many years i dont see this happen.
Yes bitcoin is increasing so it is possible for the time being will not disappear. But if bitcoin left behind and did not develop it would be able to make it decline and disappear. So the bottom line for bitcoin is constantly evolving and changing, bitcoin will continue to exist.