I think that this is just the beginning. In my opinion, we're heading for a tech bust that's going to spread to the rest of the economy, and deflate additional bubbles (housing, for one). The government has been pushing cheap money for the better part of a decade in the name of creating the appearance of a 'recovery', but what they've really done is build a new house of cards. Make no mistake: the 'free' money that's…
"Too expensive" does not equal bubble. It has to be expensive because speculators are driving the price up, thinking they're all fooling each other. As soon as they get get scared that the other speculators might be thinking of selling the price suddenly collapses as they race to not be the last to divest.
If something is expensive because it's scarce, is actually being practically used, and there are no substitutes, then there is no way to make the price suddenly collapse other than flooding the market with new supply, and it would take many years to increase the supply of housing by a significant percent. If the price of housing drops a bit all of the homeowners aren't going to rush to sell their homes in a panic like you might see with a purely speculative asset.