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.