There are sustainable and necessary technologies that a lot of these currencies are built around. It seems to me that these are changing the way investing and money management will be approached in the future, as well as how the world will create content and access the Internet. Welcome to the internet 3.0!! Blockchain technology is amazing, and warrants a large portion of the run up of several of these coins. Others are climbing on the hype and backs of the bigger ones, then there is a place like steem which is generating an amazing community with great discussion about this technology all while sharing the wealth to contributors. To me it all seems ahead of the pack and the world will catch up, causing the real bubble before things settle back out to healthy levels. Just my 2 cents.