For me possibly to yes. History is littered with currencies that failed and are no longer used, such as the German Mark during the Weimar Republic and, more recently, the Zimbabwean dollar. Although previous currency failures were typically due to hyperinflation of a kind that Bitcoin makes impossible, there is always potential for technical failures, competing currencies, political issues and so on. As a basic rule of thumb, no currency should be considered absolutely safe from failures or hard times. Bitcoin has proven reliable for years since its inception and there is a lot of potential for Bitcoin to continue to grow. However, no one is in a position to predict what the future will be for Bitcoin.
Yes your concern is right as no one in this world can predict what will happen in the future in not just currency but in all aspects of life.In past many currencies has dissolved but these currencies where individual hasn't had any other option but it is not the case with bitcoin as it has alts to cover.Alts are the one which stables the bitcoin in critical situations. Believe it or not if bitcoin goes down the whole crytocurrencies goes down .This market is not run by people who started this but it is run by new people who invest in it. New people who invest even in alts does with a trust that they have in bitcoin.Bitcoin is brand of whole crypto company and if this goes down it it is a downfall of whole crypto world. Which is unlikely to happen.