You would hope that from one bubble to the other people learn something.

The last bubble, people thought than making stuff available online was enough (Do X but on the internet). The first crisis taught us you need to have an actual business model and a way to acquire client.

But then, Google happened. Big user base can be monetized. So we have a second bubble where acquisition of user is the main driver, with the assumption than like google they will find a way to milk their users. At some point that bubble will explode too.