Has the Cryptocurrency Fad Passed?

Discussion for Has the Cryptocurrency Fad Passed?
I'm seeing so many reports of people losing money on alt coin investments. I understand that blockchain will probably remain relevant for a long time, but is cryptocurrency even worthwhile nowadays. I don't have a perfect understanding of this and I'd like to so your input would be awesome.

Also, what is your opinion about alt coin mining? I have a friend who started doing it for about 2 months and then gave up because the cost of the supercomputer and monthly power bills was way over his ROI.