Bitcoin will not fail. It is a very young currency, and many new features are being built into it that makes it better than ever. Just like the internet is the underlying technology that powers the entire internet, the blockchain is the underlying technology that powers bitcoin. Other forms of digital currency are being built on the blockchain. All of these will continue to grow and expand and become more widespread. The blockchain, unrestricted by being tied to any one digital currency, will continue to grow as well.
nobody knows if bitcoin will fail or not, bitcoin would have fail assuming government continue to abolish the development. Since is being created by some one bitcoin can fail. Even with fear of investors and bad news that will come from a country that is supporting bitcoin will make it to lose some values, if bitcoin will fail is not of ten years now because of the massive support and the way countries that is having crisis is using it for surviving through importations and donations