I personally believe in blockchain technology. And it is already proved it's importance. “Bitcoin” was the first successful experiment done with combination of blockchain and cryptography. Which gives a real breakthrough to worlds economy.
The concept of blockchain technology is similar to that of the database, except in the way we interact with it, which is different.
For developers blockchain concept represents a paradigm shift in the way software engineers will write software applications in the future, and this is one of the key concept that should be well understood.
There are really five key concepts and ways of interacting with each other in the context of this new computing paradigm:
the blockchain,
decentralized consensus,
trusted computing,
smart contracts,
proof of work/stake.
This computing paradigm is important because it is a catalyst for creating decentralized applications in the subsequent steps of distributed computing architectural constructions.
The world is becoming digital and it is just the beginning. The cryptocurrency (especially Bitcoin )is one of the biggest invention of 21st century. And this is a revolution in finance and economy globally.