Of course there's a bubble, and of course it has to burst at some point. There are frankly a plethora of poorly conceived and poorly executed startups on the scene right now, with no hope of ever achieving financial sanity. Just as we saw in the late '90s with any crazy idea being given a ton of VC funding, regardless of whether they had a sane business plan, only to implode when things got tight.

Unfortunately, this time around the successes of the previous rounds actually made things worse, because they succeeded too much. VC funding is now, intentionally, a casino. The RoI you can get from growing a winner fast enough to dominate some new market so outclasses what you can earn back from helping a sensible startup grow at a reasonable level that most VCs concentrate their funding to match. It's all about disrupting and breakthroughs and growing fast. This ends up bringing a lot of "unicorns" into existence even if only a few of them are ultimately viable. It also leaves a lot of smaller, more sensible startup ideas in the dust. Silicon Valley is all about stuff that's "cool", not stuff that's challenging or valuable. Sadly, even this round of the bubble bursting is unlikely to change that.