Blockchain is the technology which underpins Bitcoin and other digital currencies.
It is a database of financial transactions which is saved on multiple computers and which constantly grows as new transactions or “blocks” are added to it, forming a continuous and public chain of data.
According to BBC News, blockchain may still be in its infancy, but venture capitalists are already pouring billions into start-ups with more clearly defined plans.
Even Facebook is getting involved.
And billions more are being raised in the regulatory grey area of initial coin offerings, where companies raise money by selling digital currency to investors.
Enthusiasts say blockchain could become as disruptive as the internet, comparing the technology to the World Wide Web in the 1990s.
At that time, many people were clear it would become important but few really understood it or foresaw its potential and limitations.
So what problem is blockchain trying to solve, and should we believe the hype? – BBC News