In five years (maybe less) this ICO thing is going to be a wasteland.
are you sure about the years thing? more like five weeks or months.
True.
Its hard to judge because there hasn't been anything like this since the dotcom bubble in the 90's
I believe it was about five or six years before everything started to fall apart (1994 to just after 2000 before a lot of big companies went bankrupt)
https://en.wikipedia.org/wiki/Dot-com_bubblelists the biggest gain and then drop from about 1998-2001 so only 3 or 4 years at its peak.
"On March 10, 2000, the NASDAQ Composite peaked at 5,132.52, but fell 78% in the following 30 months"