Blockchain is a way if keeping records in a collective fashion, and somehow many say that Blockchain will open up new possibilities, change the world, and affect us all.
Today, we use the internet without giving it a second thought. Explaining how blockchain would impact the world is similar to explaining how the internet would impact the world in its early days, say the early 90s, when few understood its importance.
As an example, the global economy depends on the exchange of goods and services, and the internet has indeed connected more people across cities and borders, and along the way reinvented the way we buy or sell things. Take the example of online-marketplaces or ride-sharing services (like Alibaba, eBay or Uber): Without the internet all these ways of conducting business would not be possible. In a world without the internet, we would have to go the the local traditional market or store if we wanted to get anything. The poor or unemployed