Blockchain - what is it? For those familiar with it, it might surprise you to realize how few people have even heard of it. Blockchain is an extremely promising technology in our endless search for ways to increase computing power, speed and security. By eliminating the "middle man," both security and speed are automatically increased, which by itself could be considered an incredible increase in computing power. Many startups are going this way. Banks, insurance companies, video games and more are either seriously considering it, or already using it.