[adventured]

It hasn't lasted ten years. The last one ended with the great recession, and was of course never a bubble of the scale of the dotcom bubble. This latest semi-bubble (ie extremely elevated valuations) - caused solely by the Fed's hyper low interest rate policies pushing up all asset prices - is far more similar to 2005-2007 than 1999. The pre great recession semi-bubble in tech was also caused by asset inflation from bad Fed policy mistakes.

It's also why this latest bubble / not-bubble was popped by the first Fed moves toward hiking rates. All the panic around unicorn blood in the street started exactly in line with the Fed's moves to hike rates (nice coincidence eh). And it's also why the stock market has struggled to move higher since the Fed's QE program ended (sideways for ~19 months now). If the Fed hikes rates (which they won't in any meaningful way), it'll continue to deflate all elevated asset prices.