This is a great video from a Youtuber, Joe Scott, who is not currently on Steemit.
In the video he addresses Blockchain, touching on Steemit, Substratum, IOTA, and many other important points.
I really think this video is great, as is much of his other content. He talks about space, technology, and other big topics.
Please watch the link and if you enjoy then I encourage you to comment and invite him to Steemit. I did!