It's funny, all these technologies you listed are all ones that are hyped for hyped sake before having an actual use case. What actual, useful purpose does Blockchain provide? Like really. Apart from "a computationally burdensome way to hate the government."[1] Because all I ever see things like "blockchain-backed sex contracts" or "mangocoin - how IBM helped Walmart and farmers". I thought the most promising use case was when the Australian securities regulator announced they were going to put all the shares in the blockchain, but then I just realised that there's no actual concrete benefit from it - nothing they're doing can't be achieved by a simple, centralised database.
[1]: https://twitter.com/sarahjeong/status/951163739562061824?lan...