Bitcoin is a potentially revolutionary technology in a very early stage. The important new part, the consensus algorithm, is ground breaking.

Now, the very first implementation (Bitcoin) kinda sucks, like most technologies in their first versions. But there are newer generations, each more interesting, and each unlocking more possibilities. We are for example getting:

* No-autority enforcement of contracts (Ethereum).

* A distributed computation (operating) system (EOS).

* Decentralised finance, for example lending platforms (AAVE).

* Cash-like payment system suitable for real-world payments (Monero).

We're only eleven years in so it's a bit too early to say if it's all rubbish or if it will change the world.