I agree but I also think it is a larger scale problem. like the whole planet.

Do you think the companies that have healthy price to earnings ratios are in a bubble?

Most people will deny a bubble exists until it's incontrovertible, while they keep saying their "twitter for pets" is really worth 1bi USD.

We have to be open to the modest return, small business dot coms. A company of say, 20 people, each making about 150k or so and being completely satisfied with the state of things.

I think there's a culture of expecting reasonable businesses to seek unreasonable goals.

Until the valley can move from "always dream big" to "well sometimes, just plan sensibly", it will be perpetually unstable.

I remember a strip mall across from a corporate office park. Every couple months, a new .com would go in and another would go out of business, but in the strip mall the same places had been there for 20 years. The web isn't going anywhere, there's nothing wrong with providing for the long term.

No, the web isn't going anywhere...many have come and gone, as you correctly point out...and will again...

It's very likely that only so many "home runs" can be hit...that doesn't mean you can't do very well for yourself by focussing on a niche need, a good product, and excellent service...

A winning business model since mankind first began trading and bartering...

You make a very, very good point...

Well, then you can make a lot of money off of them by shorting publicly traded tech companies trading at massively inflated valuations.

Doesn't shorting a stock require that you select a time at which the stock will be worth less than it is now? Isn't that just a slightly different way of trying to time the market?

Presumably someone might think we are in a bubble and be right, but not have enough information to know when the market will correct or to what degree.