A non-exhaustive list of why Bitcoin has tremendous value include the following attributes:

- A medium of exchange
- A store of value
- A digital commodity
- Decentralized, peer to peer, programmable money
- Accessible in every country, valued at an internationally understood market rate
- Infinitely divisible currency that enables micropayments, crowdfunding and other emerging business models
- Safe, secure – cannot be confiscated, frozen, manipulated or inflated away with proper precautions
- Is scalable at the level of individuals, companies, and even governments
- The most efficient way of transferring money regardless of geographic distance, size of transaction, and whomsoever the - -sender or receiver might be
-Highly adaptive given its open-source, peer to peer nature, ensuring its long term survival as economic, financial and technological conditions evolve over time
-A growing ecosystem that includes ATM machines, bitcoin exchanges, software systems, equity markets, user friendly encryption solutions, user wallets, and transaction-related applications that, on a whole, create powerful network effects of usability, access and critical mass
(from http://bitcoinreflections.com/ - thank you)